This is correct, and those videos (five I believe) were removed at Aaron's request at the end of the contract term this week. This was Aaron's decision, and per our artist agreements, we must all respect it.
We are of course disappointed to see such good content go, but new 1-on-1 content is added very frequently (in production of 2 more today) and we will continue to cover new ground. In particular, we want to make sure that we enhance the beginner / intermediate material (Card Magic 101) that Aaron's 1-on-1's offered.