AlexT
It is possible to implement it as 3rd-party module, build-in HTML5 Player gives an example on how to replace standard audio/video player with custom one.
Audanbal
If audio are included in videos. Then we demand subtitles (CC) in videos as well! Mister Boon stated, "Yep, we're working on some HTML5 video implementation. It will improve gradually once we have it working."

I only see two updates according to videos in this version (poster and thumbnail). I think it's time to implement subtitle (CC) in the next update. Otherwise, you're being audism. This was in my blog of Ideas & Dreams 2 years ago. Testing our patiences must end. So, we are see more asking again,..."SUBTITLE NOW, PLEASE!"
 
 
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