I follow Mend It Mark on a regular basis. Fabulous repair tech that even does his own metal work for mechanical repairs. I saw the original video when it was posted. The copyright strike made no sense. The only schematics he showed were the IC manufacturer's sample circuit design for the op-amps. He created his own service manual for the pre-amp, but never showed the contents. He did show that the pre-amp had some dodgy plastic stand-offs that broke in shipping, which should not happen on a £25,000 pre-amp.
There are no super expensive parts in the pre-amp. The cost is mostly labour as the parts are hand selected and matched to very tight tolerances. Not that I think any pre-amp in the world is worth that much money. Not even TLS Guy's pre-amp, which can be fine tuned for each record label of the era, cost that much money. Tom has just earned himself a whole lot of disrespect in the community.
It's hilarious what Rossman is doing and he's not alone. Mark's video is showing up on other YT channels as well. As Rossman has said before, you can't delete anything completely from the internet.