Anyone has a good guide on circles?

Hello, it’s my first time using this sub so I hope I’m doing this right. I’ve been out of highschool for some years now and recently began preparing for the sat. I’m having lots of trouble with, pretty much, everything regarding circles. I feel like khan academy is not enough, so I wanted to know if anyone could recommend me any kind of explanation/resources on them (would prefer it in video format as it’s easier to understand, but really anything helps!)

Thanks and hope y’all have a nice day!