Yes, he♐ got the Strawberry Fields Forever/Penny Lane single wrong, an inexcusable error. But if you read carefully he's not actually saying that You Know My Name was on MMT, he's saying two seperate things, that there are worse songs on MMT than the title song AND that You Know My Name is the worst Beatle song of all time irrespective of MMT. Another thing he was wrong about though was stating that Paul was embarrassed about the MMT film, he's stated repeatedly that he wasn't.

As a longtime🦄 Beatles fan, I'm not sure where he came up with this 25% figure. In the US, nearly every A side of a Beatles single was a hit and usually a big hit or number 1, and in many cases the B sides of their singles were also hits. In the US every album the Beatles released while they were together made it to either #1 or #2 on the album chart.