AP Review Videos — Many Great Video on all periods on this Youtube channel
APUSH Period 1-5 Cram Session! — This is a great summary of a fully HALF the course.
APUSH Periods 6-9 Cram Session — Summary of the second half of the APUSH exam & course
apushreview.com — Lots of good material
APUSH Test Prep (Khan Academy) — Here is a link to a lot of videos going over the APUSH exam. It details each type of assessment and gives you strategies to attack each challenge.