Close. Seems to me more like he didn’t realize that Piped is an alternative front end to YouTube, and assumed that someone had actually reuploaded his YouTube content elsewhere.
Yeah I realized it while sleeping and when I woke up it was too late to edit. I meant to say the takedown was likely sent to the abuse contact on the whois info for cloudflare's ip address. Could be his own content he's claiming or something he really didn't want public and just exhausted every potential avenue to send takedown requests to. Not going to assume either way, but that's likely how this started.