![HLS/MP4/etc Video Playback (Unless of course, Microsoft Windows 10 Media Feature Pack was included) not working or playing or (re)loading (example: Twitter, or et cetera, or other) in Windows 10 Safe Mode : HLS/MP4/etc Video Playback (Unless of course, Microsoft Windows 10 Media Feature Pack was included) not working or playing or (re)loading (example: Twitter, or et cetera, or other) in Windows 10 Safe Mode :](https://preview.redd.it/fo9jc8samwc81.png?width=1920&format=png&auto=webp&s=89d392854d65904782cd93c679966ef8d0097354)
HLS/MP4/etc Video Playback (Unless of course, Microsoft Windows 10 Media Feature Pack was included) not working or playing or (re)loading (example: Twitter, or et cetera, or other) in Windows 10 Safe Mode :
![No video with supported format and MIME type found." on videos native interface can play · Issue #1590 · nolanlawson/pinafore · GitHub No video with supported format and MIME type found." on videos native interface can play · Issue #1590 · nolanlawson/pinafore · GitHub](https://user-images.githubusercontent.com/1385527/66963678-7f38bf80-f031-11e9-92fd-1ea75401a2e3.png)
No video with supported format and MIME type found." on videos native interface can play · Issue #1590 · nolanlawson/pinafore · GitHub
![Firefox 49 error "This browser does not support video playback" playing mp4 videos in Twitter in Win 8.1 with Flash Player 23.0.0.162 | Firefox Support Forum | Mozilla Support Firefox 49 error "This browser does not support video playback" playing mp4 videos in Twitter in Win 8.1 with Flash Player 23.0.0.162 | Firefox Support Forum | Mozilla Support](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2016-09-29-13-37-52-ec2966.png)