Downdetector seems like a great place to advertise. You have a bunch of people who were forced to abandon the provider of whatever type of service that your company may offer. What a great opportunity to show customers your competing product.
(I have no idea whether YT revenue is meaningful for smaller players, to be clear; I suspect not, but I also suspect it's worse elsewhere.)
There's a 2018 copyright date in the footer, so I guess that's as alive as it needs to be.
I noticed the outage because I wanted to watch a stream, so I might go to Twitch now. Often I use Youtube for music, where Spotify is a solid alternative with many of the same creators. If I want to see that video from reddit of people throwing burning flares at a balcony I can probably find it on LiveLeak. Many of the educational channels I've subscribed are also on Nebula, but I could also watch a documentary on Netflix or Disney+ instead.
When your main differentiator is "free speech" and your competitors don't actually restrict the speech they carry that much, you're pretty much only going to get the dross that was cast off the other platforms and very little else.
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.