@peertube nice to see that contributing bandwidth is around the top. I also developed a client based on libtorrent, but then found out that webtorrent is practically phased out of peertube for some browser only, custom solution.
After asking for another solution besides running a peertube instance, the answer was "Unfortunately, no". That's when I gave up.
https://github.com/Chocobozzz/PeerTube/issues/4895
Hopefully, with that feature request being at the top now, it'll be made possible.