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MIME type for audio is video/mp4 · Issue #203 · video-dev/hls.js · GitHub
Support HLS w/ MP4 subtitles without MIME type info · Issue #1959 · shaka-project/shaka-player · GitHub
Cómo configurar correctamente mime-type de vídeos en Amazon S3
How to Fix "Sorry, this file type is not permitted for security reasons"
Save video error on Android: MIME type video/mp4 cannot be inserted into content://media/external/images/media; expected MIME type under image/* · Issue #423 · react-native-cameraroll/react-native-cameraroll · GitHub
how to add/edit/remove MIME types in Plesk - Knowledgebase - AccuWebHosting