How are subtitles handled? I don't know technical details about encoding, but some movies i watch have "built in" subtitles, but they are not hardcoded, so that i can turn them off. All desktop players load them automacicaly, but i wonder if they won't be lost during conversion at videobb.
If am not wrong you have seend mkv files played by divx webplayer.
MV had option when you have added mkv file with subs, the video was encoded with subs but hardcoded.
I have not seend flash player with option for turning on/off subs.
You can allways add normal video and use playback with external player and than you can load subs.