I'm not sure if the following link is exactly what you need (you'll need some more info)...But, i thinki it is in the direction that you need: https://docs.joinpeertube.org/api-embed-player

Basically, what you are asking is possible, and you should navigate around the documentation specific to the Peertube api. (Sorry, trying not to sound like a guy who responds with "RTFM"....but, i guess i sort of am; sorry :-)

But, hey, what you want is possible! :-)