I haven't watched the video, having only a slow dial-up connection, and probably wouldn't have even if I had a faster connection. Video and audio are a distraction when considering intellectual matters. Your biases will have a field day with all the intellectually extraneous information you receive. There was research done in the 1990s, I haven't been able to find a reference, that given a written transcript, "juries" performed more accurately than with an audio recording, which in turn was more accurate than an audiovisual.