In the past it was standard practice for all the concerts (and I believe the workshops, too) to be recorded for archival purposes and the recordings were available for loan from the AHS archives, much like a library. I remember getting a list of available recordings years ago and borrowed an audio tape of Dorothy Remsen giving a presentation about playing in a recording studio. I don’t know if visual recordings are available. I know highlights of one of the pop/jazz festivals were sold in DVD format because a friend gave me one. It does take some time after the conference to get all that stuff edited so it may be a while before they are available.