Well, ideally, the best platform for video is one that is not for video, but instead simply attaches appropriate information to existing videos, or aggregating

Well, ideally, the best platform for video is one that is not for video, but instead simply attaches appropriate information to existing videos, or aggregating links to existing videos present on the internet and attaches that information as a third party service, which then allows them to be searched via a standard search engine and viewed/downloaded directly. Like it was before youtube in the good old altavista days, and like is still the case for images. But if you must have a platform, there are several alternatives to youtube: peertube, odysee, lbry, ipfs, (legal) torrents, internet archive, oldskool p2p tech, ... There's also alternative interfaces to youtube (e.g. youtube-dl, newpipe libretube), though that's a suboptimal solution to the larger problem.