Hi, my name is Bogdan.
I have experience with adding subtitles in videos (embeded in mkv format or directly placed in videos).
For embeded subtitles you'll need player that is capable of playing videos with embeded subtitles (vlc, bsplayer), smart tv that is also capable of playing subtitles...
We can discuss about job in chat and you can decide if you want to hire me.
Best regards,
Bogdan Prascevic