FieldTrip workshop at Washington University, St Louis
The workshop consisted of lectures and hands-on sessions. The lectures were broadcasted using WebEx and recorded. The recordings have been made available online on the HCP site. Regretfully they have rather poor audio; it was recorded with the speakerphone hanging on the wall, not with a proper microphone.
Another presentation that is available online is the FieldTrip lecture series at BRAMS (International Laboratory for Brain, Music and Sound Research). These lectures were presented and recorded by Julian Keil, an enthousiastic user in Montreal. See http://vimeo.com/user11934546/videos.