The opening rendition of "Out On the Weekend" kills the version on Harvest. He introduces "Old Man" as a new song, so I guess all the Harvest stuff was new here. There's even a few songs from Time Fades Away, which was still two years from being recorded, let alone released. My guess is the audience hadn't heard most of the songs he played.
Also, his between-songs banter is rather amusing, in particular the comments about advertising on American television.
Thanks to the Other Side for the heads up on this one.