What makes Ringo a great drummer?

A German drummer named Sina has a popular YouTube channel about drumming. In this video she demonstrates why Ringo Starr was a great drummer.
Interestingly, because Sina couldn't use The Beatles original recordings for copyright reasons (YouTube's Content ID algorithm doesn't care about fair use) she used recordings from a Beatles' tribute band her father was in, 'The Silver Beatles.' (Fun fact: The Beatles were once called 'The Silver Beatles.')
Image: sina-drums/YouTube