We're looking at something new running on the Librem 5 Dev Kit every single day.
Day 3: Web Browser
You have a Peertube account. Peertube is nicely integrated with Mastodon. There is at least one public script to simultaneously push video to youtube and Peertube.
y u no use?
Okay. Perhaps you might also post, as a hybrid solution for the nonce, invidious urls? e.g. https://invidio.us/watch?v=u9X53UGdvX8