diff --git a/h5peditor-file.class.php b/h5peditor-file.class.php
index 858f3783..37fddcfd 100644
--- a/h5peditor-file.class.php
+++ b/h5peditor-file.class.php
@@ -152,7 +152,7 @@ public function validate() {
           //'video/ogg' => 'ogg',
         );
         if (!$this->check($allowed)) {
-          $this->result->error = $this->interface->t('Invalid audio file format. Use mp3 or wav.');
+          $this->result->error = $this->interface->t('Invalid audio file format. Use mp3, m4a, wav or ogg.');
           return FALSE;
 
         }
@@ -168,7 +168,7 @@ public function validate() {
           'video/ogg' => 'ogv',
         );
         if (!$this->check($allowed)) {
-          $this->result->error = $this->interface->t('Invalid video file format. Use mp4 or webm.');
+          $this->result->error = $this->interface->t('Invalid video file format. Use mp4, webm or ogv.');
           return FALSE;
         }
 
diff --git a/language/ar.js b/language/ar.js
index b7296daf..e299198b 100644
--- a/language/ar.js
+++ b/language/ar.js
@@ -33,8 +33,8 @@ H5PEditor.language.core = {
   commonFieldsDescription: 'يمكنك هنا تعديل الإعدادات أو ترجمة النصوص المستخدمة في هذا المحتوى.',
   uploading: 'جاري التحميل .. الرجاء الانتظار...',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   noFollow: 'لا يمكن متابعة الحقل ":path".',
   editCopyright: 'تعديل حقوق الطبع والنشر',
   close: 'اغلاق',
diff --git a/language/bs.js b/language/bs.js
index 73c9183e..f3f04d34 100644
--- a/language/bs.js
+++ b/language/bs.js
@@ -33,8 +33,8 @@ H5PEditor.language.core = {
   commonFieldsDescription: 'Ovdje možete urediti podešavanja ili ili tekst korišten u ovoj sadržaju.',
   uploading: 'Učitava se, molimo sačekajte...',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   noFollow: 'Ne možemo slijediti polje ":path".',
   editCopyright: 'Urednite autorska prava',
   close: 'Zatvoriti',
diff --git a/language/cs.js b/language/cs.js
index 0b51fa14..31c29cdf 100644
--- a/language/cs.js
+++ b/language/cs.js
@@ -32,8 +32,8 @@ H5PEditor.language.core = {
   commonFieldsDescription: 'Zde můžete upravovat nastavení nebo překládat texty použité v tomto obsahu.',
   uploading: 'Nahrávám, počkejte prosím...',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   noFollow: 'Nelze sledovat pole ":path".',
   editCopyright: 'Upravit autorská práva',
   close: 'Zavřít',
diff --git a/language/de.js b/language/de.js
index d8e952f6..1bc34c83 100644
--- a/language/de.js
+++ b/language/de.js
@@ -34,8 +34,8 @@ H5PEditor.language.core = {
     'Hier können Bezeichnungen bearbeitet oder Texte übersetzt werden, die in diesem Inhalt verwendet werden.',
   uploading: 'Lade hoch, bitte warten...',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   noFollow: 'Dem Feld ":path" kann nicht gefolgt werden.',
   editCopyright: 'Rechteangaben bearbeiten',
   close: 'Schließen',
diff --git a/language/el.js b/language/el.js
index 4d2b770e..e2433bd9 100644
--- a/language/el.js
+++ b/language/el.js
@@ -34,8 +34,8 @@ H5PEditor.language.core = {
     'Εδώ μπορείτε να επεξεργαστείτε ρυθμίσεις ή να μεταφράσετε κείμενα τα οποία χρησιμοποιούνται σε αυτό το περιεχόμενο.',
   uploading: 'Μεταφόρτωση, παρακαλούμε περιμένετε...',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   noFollow: 'Δεν είναι δυνατή η παρακολούθηση του πεδίου ":path".',
   editCopyright: 'Επεξεργασία πνευματικών δικαιωμάτων',
   close: 'Κλείσιμο',
diff --git a/language/en.js b/language/en.js
index 032d9ebb..2b8eaaf8 100644
--- a/language/en.js
+++ b/language/en.js
@@ -38,8 +38,8 @@ H5PEditor.language.core = {
   uploadAudio: 'Upload Audio',
   uploadOr: 'or',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   pasteVideoLink: 'Paste YouTube link or other video source',
   pasteAudioLink: 'Paste link or other audio source URL',
   dropVideo: 'Drop video file here to upload',
diff --git a/language/es-cr.js b/language/es-cr.js
index 902d5f37..5ff10566 100644
--- a/language/es-cr.js
+++ b/language/es-cr.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Modo de edición',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Error en la subida del archivo',
   fileToLarge: 'El archivo que intenta subir es demasiado grande.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/es-mx.js b/language/es-mx.js
index b8be2bdf..2988b4d3 100644
--- a/language/es-mx.js
+++ b/language/es-mx.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Modo de edición',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Error en la subida del archivo',
   fileToLarge: 'El archivo que intenta subir es demasiado grande.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/es.js b/language/es.js
index 558bb55e..833984c5 100644
--- a/language/es.js
+++ b/language/es.js
@@ -34,8 +34,8 @@ H5PEditor.language.core = {
   uploadAudio: 'Subir Audio',
   uploadOr: 'o',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Elige</button>, arrastra o pega el fichero aquí', 
-  dragAndDropAndPasteAudioDescription: 'Máx. 20 MB,formatos soportados: .wav, .mp3, .ogg', 
-  dragAndDropAndPasteVideoDescription: 'Máx. 2 GB,formatos recomendado: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Máx. 20 MB,formatos soportados: .wav, .mp3, m4a, .ogg', 
+  dragAndDropAndPasteVideoDescription: 'Máx. 2 GB,formatos soportados: .webm, .mp4, .ogv',
   pasteVideoLink: 'Pega el enlace de YouTube u otro enlace de video',
   pasteAudioLink: 'Pega el enlace u otra fuente del audio',
   dropVideo: 'Arrastra el video aquí para subirlo',
diff --git a/language/et.js b/language/et.js
index ebaed801..219a7686 100644
--- a/language/et.js
+++ b/language/et.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Redigeerimismood',
   listLabel: 'Loetelu',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Faili üleslaadimise viga',
   fileToLarge: 'Fail, mida püüad üles laadida, võib olla liiga suur.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/eu.js b/language/eu.js
index 59a3621d..32505c66 100644
--- a/language/eu.js
+++ b/language/eu.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Edizio modua',
   listLabel: 'Zerrendatu',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Fitxategiaren karga errorea',
   fileToLarge: 'Kargatzen saiatzen ari zaren fitxategia handiegia izan daiteke.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/fi.js b/language/fi.js
index c1b4623c..c204ae48 100644
--- a/language/fi.js
+++ b/language/fi.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Muokkaustila',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Virhe tiedoston latauksessa',
   fileToLarge: 'Tiedosto jota yrität ladata saattaa olla liian suuri.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/fr.js b/language/fr.js
index fc8e3089..b9e03246 100644
--- a/language/fr.js
+++ b/language/fr.js
@@ -32,8 +32,8 @@ H5PEditor.language.core = {
   uploadAudio: 'Ajouter un fichier audio',
   uploadOr: 'ou',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choisir</button>, déposer ou coller un fichier ici',
-  dragAndDropAndPasteAudioDescription: 'Max. 20 MB,formats supportés : .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max. 2 GB,formats recommandés : .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max. 20 MB,formats supportés : .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max. 2 GB,formats supportés : .webm, .mp4, .ogv',
   pasteVideoLink: 'Coller un lien YouTube ou une autre source vidéo',
   pasteAudioLink: 'Coller un lien ou une autre source audio', 
   dropVideo: 'Déposer un fichier vidéo ici pour l\'ajouter',
diff --git a/language/gl.js b/language/gl.js
index 1d8720f0..ae50b7f2 100644
--- a/language/gl.js
+++ b/language/gl.js
@@ -38,8 +38,8 @@ H5PEditor.language.core = {
   editMode: 'Modo de edición',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Erro na carga de ficheiros',
   fileToLarge: 'Poida que o ficheiro que estás tentando cargar sexa demasiado grande.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/it.js b/language/it.js
index fc9e9054..c30677fb 100644
--- a/language/it.js
+++ b/language/it.js
@@ -38,8 +38,8 @@ H5PEditor.language.core = {
   editMode: 'Modalità modifica',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Errore nel caricamento del File',
   fileToLarge: 'Il file che stai cercando di caricare potrebbe essere troppo pesante.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/ko.js b/language/ko.js
index 77322157..6c9088c4 100644
--- a/language/ko.js
+++ b/language/ko.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: '편집모드',
   listLabel: '목록',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: '파일 업로드 오류',
   fileToLarge: '업로드하려는 파일이 너무 클 수 있음.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/nb.js b/language/nb.js
index 92cdfbca..21377b26 100644
--- a/language/nb.js
+++ b/language/nb.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Redigeringsmodus',
   listLabel: 'Liste',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Velg</button>, dra inn eller lim inn fil her ',
-  dragAndDropAndPasteAudioDescription: 'Maks 20 MB,støttede formater: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Maks 2 GB,anbefalte formater: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Maks 20 MB,støttede formater: .wav, .mp3, .m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Maks 2 GB,støttede formater: .webm, .mp4, .ogv',
   uploadError: 'Filopplasting feilet',
   fileToLarge: 'Filen du prøver å laste opp kan være for stor.',
   fileSizeLimit: 'Filen du prøver å laste opp er for stor. Grensen er :sizeLimit.',
diff --git a/language/nl.js b/language/nl.js
index 0e49fe23..e121e28c 100644
--- a/language/nl.js
+++ b/language/nl.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Bewerkmodus',
   listLabel: 'Lijst',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Fout bij uploaden bestand',
   fileToLarge: 'Het bestand dat je probeert te uploaden kan te groot zijn.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/nn.js b/language/nn.js
index 346051e2..d3b9f29f 100644
--- a/language/nn.js
+++ b/language/nn.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Redigeringsmodus',
   listLabel: 'Liste',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Filopplasting feilet',
   fileToLarge: 'Filen du prøver å laste opp kan være for stor.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/pl.js b/language/pl.js
index 1da6a774..d6ad18b3 100644
--- a/language/pl.js
+++ b/language/pl.js
@@ -38,8 +38,8 @@ H5PEditor.language.core = {
   editMode: 'Tryb edycji',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Błąd podczas dodawnia',
   fileToLarge: 'Plik, który chcesz przesłać, może być zbyt duży.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/pt-br.js b/language/pt-br.js
index 18b69cbe..e8377270 100644
--- a/language/pt-br.js
+++ b/language/pt-br.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Modo de edição',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Erro de envio de arquivo',
   fileToLarge: 'O arquivo que você está tentando enviar pode ser muito grande.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/pt.js b/language/pt.js
index c0b85959..2c0497c1 100644
--- a/language/pt.js
+++ b/language/pt.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Modo de edição',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Ocorreu um erro ao enviar o ficheiro',
   fileToLarge: 'O ficheiro que está a tentar enviar talvez seja muito grande.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/ru.js b/language/ru.js
index 0553a25e..cd2c6803 100644
--- a/language/ru.js
+++ b/language/ru.js
@@ -41,8 +41,8 @@ H5PEditor.language.core = {
   editMode: 'Режим редактирования',
   listLabel: 'Список',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Ошибка загрузки файла',
   fileToLarge: 'Файл, который вы пытаетесь загрузить, может быть слишком большим.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/sl.js b/language/sl.js
index 7bfa884e..9402893f 100644
--- a/language/sl.js
+++ b/language/sl.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Urejevalni način',
   listLabel: 'Seznam',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Napaka pri nalaganju datoteke',
   fileToLarge: 'Datoteka, ki jo poskušate naložiti, je morda prevelika.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/sv.js b/language/sv.js
index 99043747..726eac04 100644
--- a/language/sv.js
+++ b/language/sv.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Redigeringsläge',
   listLabel: 'Lista',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Fel vid filuppladdning',
   fileToLarge: 'Filen som du försöker ladda upp kan vara för stor.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/tr.js b/language/tr.js
index c04bcd8f..3ee7f115 100644
--- a/language/tr.js
+++ b/language/tr.js
@@ -39,8 +39,8 @@ H5PEditor.language.core = {
   editMode: 'Düzenleme modu',
   listLabel: 'Liste',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: 'Dosya Yükleme Hatası',
   fileToLarge: 'Yüklemeye çalıştığınız dosya çok büyük olabilir.',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/zh-cn.js b/language/zh-cn.js
index 5c81e25c..f02fa05c 100644
--- a/language/zh-cn.js
+++ b/language/zh-cn.js
@@ -38,8 +38,8 @@ H5PEditor.language.core = {
   editMode: '编辑模式',
   listLabel: '列表',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: '文件上传错误',
   fileToLarge: '您尝试上传的文件可能太大了。',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/zh-hans.js b/language/zh-hans.js
index 5c81e25c..f02fa05c 100644
--- a/language/zh-hans.js
+++ b/language/zh-hans.js
@@ -38,8 +38,8 @@ H5PEditor.language.core = {
   editMode: '编辑模式',
   listLabel: '列表',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: '文件上传错误',
   fileToLarge: '您尝试上传的文件可能太大了。',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',
diff --git a/language/zh.js b/language/zh.js
index 5f1089e0..94834d46 100644
--- a/language/zh.js
+++ b/language/zh.js
@@ -38,8 +38,8 @@ H5PEditor.language.core = {
   editMode: '编辑模式',
   listLabel: '列表',
   dragAndDropAndPasteAudioVideoTitle: '<button class="h5p-dnd__btn h5p-dnd__btn__upload" type="button">Choose</button>, drop or paste a file here',
-  dragAndDropAndPasteAudioDescription: 'Max 20 MB,supported formats: .wav, .mp3, .ogg',
-  dragAndDropAndPasteVideoDescription: 'Max 2 GB,recommended formats: .webm, .mp4',
+  dragAndDropAndPasteAudioDescription: 'Max 20 MB, supported formats: .wav, .mp3, m4a, .ogg',
+  dragAndDropAndPasteVideoDescription: 'Max 2 GB, supported formats: .webm, .mp4, .ogv',
   uploadError: '文件上传错误',
   fileToLarge: '您尝试上传的文件可能太大了。',
   fileSizeLimit: 'The file you are trying to upload is too big. The limit is :sizeLimit.',