Hosting costs are high yeah but they are much more reachable if you scope down to “host what you actually need to emit” rather than “try to be a cheap copy of youtube” - the latter is simply pre-setting yourself for failure.

Are a “creator” that focuses on music mostly, or on archiving old TV footage, or recordings of old videogames, or stick animations? You don’t need to store everything or even most of everything in 4K 120fps in your peertube, you can just do 480p with 96k VBR (or heck, even 360p with 64k VBR in some cases) and it will be fine! Let the clients who want to upscale upscale on their end. For every minute of 4K video you can host like, almost half an hour of 360p. Similarly a creator who focuses on music dumps only needs the music tracks, not a video track of any kind (just ta video thumbnail will do).