I get that the most likely is that Tom Evans didn't like it, but could the copyright claim not be for the khruangbin^ track that he plays at the end to test the repaired channel?

I remember when I had a few friends who were making/mixing music they had to be very careful when uploading to YouTube due to automatic shazam style fingerprinting

^ I think. Didn't get to read the label

Edit: mentioned by someone upthread too https://news.ycombinator.com/item?id=42358894