I guess that there are a lot of fringe channels on Bitchute that are banned or restricted on Youtube or Facebook Video.
But Youtube doesn't only ban conspiracists and hate speech. They also will restrict content that violates their community standards such as explicit instructions on slaughtering chickens on a farm, or how to field-dress a deer when hunting.
Even the Rob the Ranger channel has had videos taken down for inappropriately explicit content, when showing lions mating for example.
Youtube throws a wide net, and thus rather unfairly censors innocent content. Bitchute, peertube, etc. provide alternative ways to get that content online while you're waiting patiently for your appeal to go through.
And yeah, there's some content that the monitors at Youtube consider objectionable and will never be allowed, and maybe should never be allowed -- snuff films, child porn, terrorism how-to training guides, stuff like that. But I think Bitchute also takes down such content.