Add integration of subtitles in built-in video player

[willowew]

Describe the solution you'd like If a video is opened with the built-in video player, it will be displayed without subtitles. If the system video player is used instead, for example VLC, it'll display subtitles located in the same folder with similar names (for example with an .srt file). It would be nice if the built-in video player could display subtitles as well, especially as the built-in video player is the only option to display videos in the self hosted version. Even if perhaps in the future, the user is able to select to use the system video player in mediaChips on the local machine (for self-hosted), it still wouldn't be possible to use it when accessing the video from another device on the local network, so it would be nice to have it for this reason as well.

If added, perhaps a small icon could automatically be added to videos that contain a separate subtitle file.

[fupdec]

I checked if it is possible to create subtitles in the browser. yes, it can be done. I will add subtitle support closer to the full release or later.