Can I edit videos or add subtitles on YouTube?

A. 1

You have to upload it in advance.

Gentleman 8 years ago 0

OK

A. 2

I think there's a translation setting for subtitles, but I don't think it's a foreign language translation service.
If you're just talking about an infinite challenge caption, you should work on it in advance and upload it.

Gentleman 8 years ago 0

OK