Level 1 newbie question on extra material

I’m studying for level 1 and using the CFAI book. Some of the concepts I’m having trouble with. besides schweser, what are the best supplamental study material that offer a video lecture and tons of practice questions?

Also are there any other non CFA websites to help with concepts and practice ?

I was looking at accountingcoach.com for extra accounting help

I think apptuto gives you most bang for your buck in terms of Qbank questions; but no video.