Embedded Subtitles

[Alig96]

Is it possible to provide the source of the subtitles to be on a different track of the video? In my case, track 3.

[SunnyLi]

No, that is not possible.
However, since it looks like you only want subtitle on one of the track, you should be able to hack out this functionality by toggling the visibility using CSS if you are able to detect track changes.