Hive and
Steemit maybe. I don't know how relevant those platforms are, but I know that both have crypto communities. And you can post your own videos there. If I remember correctly, one of them (maybe both) supports uploaded videos from some decentralized video platform besides YouTube.
We are talking about alternative video platform so I don't know how much those platforms you mentioned are relevant in this case, and I never watched a single video on Steemit.
Usable alternatives would be decentralized Odysee (LBRY), Twitch, and one more interesting dedicated to Bitcoin that is using PeerTube and it's called
BitcoinTV.
I already saw many known channels there as a backup for youtube, for example Bitcoin Magazine, The Bitcoin Standard Podcast, Techlore,
This would certainly give us more exposure to people who are specifically following Bitcoin videos..
A repository of educational video content for the Bitcoin community, without distractions like advertising, altcoins, or third-party trackers.
https://bitcointv.com/home