"Revisiting 'The Last Waltz'" is a DVD extra that is included for the DVD of this feature film. While I noticed that one reviewer gave it a score of 1 (though they didn't elaborate exactly why), I just don't see the featurette that way at all--it's exceptional and something you MUST watch if you also watch "The Last Waltz".
The film consists of interviews with Robbie Robertson (the producer of the original film and member of The Band) and Martin Scorsese (who directed the film). I loved this because they explain how the film was made and it's a wonderful instructional video for young filmmakers. Like Hitchcock (as Robertson rightfully pointed out), Scorsese drew up his plans for the film down to the frame before they even started filming. With drawings and line by line comments about each lyric, this was NOT some home movie but a really fine-crafted film and as they explain the film making process, you really can't help but admire the work they did. An exceptional short and one that you should see.