[Feature] Multiple souces for a video-playback (audio, video, subtitle)

Do any of the systems (Windows, Android, iOS) support having multiple files that can be played simultaneously? I'm now thinking of a video, where you easily can switch the audio-channel on, or add subtitles. Anyone who tried that before?

It at least looks like it's possible with the ExoPlayer for Android: https://github.com/google/ExoPlayer/issues/73

The issue does not name any source files, tests, or implementation entry points. First determine whether simultaneous video, audio-channel switching, and subtitle tracks are supported across the Windows, Android, and iOS targets, then define the desired behavior and acceptance criteria before implementation.

Written by the indexing model from the issue text.