These videos are not narrated, but they are then embedded in the narrated lecture on the Cordilleran geologic history (post Eocene) that I developed for the class (look around 20 minutes):
Tectonic history of the western North American Cordillera (from Eocene) ppt
video narration--big file (100MB)--may need to right click and save to local disk. Lecture narrated video on Youtube
I hope these might be useful for others.