With vids probably can do something like that but sucks I have to downlod the vid and go back and add caption... lol
This was only 20min video and took me about an hour... if I did the same with the actual Live Letter gonna take long time...

Maybe in future do something like I catch bits and pieces and for Q/A portion just put in the official answer in the cc or something may work... but still gonna take some time to edit the vid with all that info.