The Who: Tommy and Quadrophenia Live with Special Guests (1989)
Elton John, Phil Collins, Billy Idol, Patti LaBelle, and Steve Winwood join the Who for this 1989 performance of Tommy at Los Angeles' Universal Amphitheatre. The performance of Quadrophenia was filmed during the 1996 to '97 tour.
The Who: Live at the Isle of Wight Festival (1970)
There are a half dozen Who concert films to draw from, but this is the earliest and the best.