Couldn't posting your normal content to PeerTube or whatever, and then selling premium content on Nebula to fund the would-be free PeerTube portion, be a potentially viable model vs. gaming the AdSense system on YT and hoping for the best?
Like, if you cover the same niche as Not Just Bikes, for example, but replace YT with PeerTube, that could maybe work provided you have a big enough following.