Invaluable question-by-question workthroughs of full-length AAMC (old-style) tests. For best results, I would try to find PDFs of 5R and 6R and work through them before watching.
Additional hours-long workthroughs of ExamKrackers' proprietary practice tests 1, 2, and 3 are on their channel, but I haven't watched them:
Examkrackers
You can also find a lot of ExamKrackers material on Scribd, but I'm not sure if I can link to specific files here.
Discover the Best eBooks, Audiobooks, Magazines, Sheet Music, and More | Scribd Message me if you have trouble finding stuff.
If I had it to do over again, I would take the classic med school gunner approach of working along in the test prep book as you go through your prerequisite classes. So those of y'all who are still taking classes have an advantage.
I think I just took all of the AAMC practice tests--I think there were 7 or so? Definitely more than 5, which is all they have available now. I may have also taken a Kaplan test or two that I found for free, but I definitely didn't pay for any non-AAMC practice tests. Waste of money. I would definitely spring for the full online AAMC bundle with all possible questions. It looks like the Fee Assistance Program will pay for it if you qualify.
Fee Assistance Program
I used ExamKrackers just because their style of explanation worked for me--I'm sure you could go with Kaplan or whomever and get good results.