You tube and Facebook etc

Is there a way of “tagging” a You tube video (which does not belong to me) in the same way one can tag a photo on facebook? If not is there a simple way of applying text (speech bubbles etc) to a video?

Hey wakou, haven’t seen you for a while. Funny, it’s an idea I discussed with some friends this afternoon. AFAWK it’s not possible yet, youtube does not give an option we could find,