I learned yesterday the video I made in 2017 explaining how Bitcoin works was taken down, and my channel received a copyright strike (despite it being 100% my own content).

The request seems to have been issued by a company chainpatrol, on behalf of Arbitrum, whose website says they "makes use of advanced LLM scanning" for "Brand Protection for Leading Web3 Companies"

I could be wrong, but it sounds like there's a decent chance this means some bot managed to convince YouTube's bots that some re-upload of that video (of which there has been an incessant onslaught) was the original, and successfully issue the takedown and copyright strike request.

It's naturally a little worrying that it should be possible to use these tools to issue fake takedown requests, considering that it only takes 3 to delete an entire channel.