^
He's very enthusiastic about the song but The Beatles were hardly innovative using that cadence. The Beatles used the Aeolian dominant scale (or "Hindu scale) as demonstrated here...
Autumn Leaves is a jazz standard that using this cadence...
I think that's the most interesting thing as a "maturing" Beatle fan. When you're younger you think their status is all about them being first at something. As if they were producing musical tropes never before heard of, pulled out of some divine ether. When you read more about them and their music you realise that's not the main point. What they were great at was using so many existing musical moves not normally associated with a rock and roll band, certainly not one writing their own material. And doing it in such a seamless way that it didn't seem forced or draw attention to itself.
So many people put the Beatles musical appeal down to its simplicity. It's more that they actually used a lot of interesting and sophisticated musical ideas while making it sound simple and accessible. Hence why musicologists still analyse them today as opposed to ruminating over Cliff Richard songs of the era.