It seems even after over a decade of Youtube airing people's pony content, Hasbro is still the chaotic entity it always has been when it comes to what is and isn't allowed for pony.
This time around there have been multiple high profile takedowns, along with a few smaller creators. DWK, LittleshyFiM, and Tridashie have all been targeted, with several videos over on DWK's channel getting the boot, along with a crazy situation where one of Tridashie's Youtube Poops was removed, followed by LittleshyFiM getting an actual copyright takedown for featuring the video in the usual Top 10 Pony Videos we've posted for years.
When appealed, Hasbro straight up rejected it and refuses to respond with anything at all. Strikes aren't your usual takedown either. 3 of those and a channel is basically gone.
Many channels have started mirroring content elsewhere like Ponytube and even chinese site Bilibili, which Tridashie detailed in his recent release.
Unfortunately all we can really do is wait and see where this goes. It could be staff swaps internally at Hasbro trying to prove themselves, a completely automated system (and considering how AI happy corporations are getting this wouldn't be surprising), or simply an error. Feel free to drop your theories below!