I feel like we all owe it to ourselves to revisit great works of art from time to time, no matter how exposed we may have been to them in the past. Recently I've gone through such a journey with The Last Waltz. I'm not going to definitively argue that it was the greatest rock concert of all time, but I will certainly listen to someone who does claim as much.
Here are my personal highlights:
Acadian Driftwood (no video footage!)
The W.S. Walcott Medicine Show (again, no footage)