I don't think a change in testing on YouTube for the last few days made any difference to the number of people who used PeerTube last month.
I like PeerTube and use it where I can, but it's still basically the content problem, which is to say there's no content on PeerTube from anyone I follow on Youtube with the exception of one dude. (Hi Jan Beta!)
I watch mostly tech/retro tech/retro gaming/random old crap Youtube stuff so it's a big overlap in user bases, but, well, no monetization means there's no incentive for people who do that as a job so there's still... nothing there.
Youtube won't make a critical screw up that'll tilt the scales meaningfully in the favor of other platforms unless they massacre payouts to the point that Patreon and sponsor funded creators no longer care about Google's pennies, and will be more receptive to at least parallel uploads to other platforms.
The user experience is unlikely to enshittify enough that creators decide to bail from the google money, no matter what they do.