Here are some clips from a 2011 Glenn Pendlay weightlifting seminar.
#1 discusses the importance of getting the bar “to the hip” in the snatch.
#2 discusses head position at the bottom of the snatch and some points on teaching/coaching philosophy.
#3 discusses a snatch learning progression from the below the knee position.
#4 discusses the double knee bend and how he addresses it as a coach.