Please note that the resources they are intially showing is the waves and simple harmonic motion lessons that will NOT be on the AP Exam. The links below for the playlist will have recordings of the live sessions as well as the upcoming LIVE events posted.
The schedule for the live streams is on the bottom of the second link so you can see your other courses, as well. The link for the youtube channel is also there if you would like to do the same for your other AP courses.
Other review resources:
Flipping Physics (all review in 240 minutes - much faster than Khan Academy if they had an AP C review course)
Equations to memorize (some are concepts)