I feel like it would be best to proxy YouTube, or subscribe to paid indie channels like nebula, but without a user base and without ad revenue or subscription revenue I don’t know how quality content can come to PeerTube. Maybe I’m just missing the content but when I’ve checked it’s all very low quality, just random unedited webcam vblogs mostly.
There’s some good channels on TILVids and Kolektiva.media, and if you’re looking for something specific, Sepiasearch is able to search across all peertube instances.