I always feel weird listening to Zeppelin shows from '80. Not because they weren't good, because they still were, but I think it is because I know it was so close to the end. The shows above were 2 weeks before Zeppelin's last show on July 7th, 1980.
Did you see the pinned comment on that YouTube video? Led Zeppelin Boots, Led Zeppelin Rarities, ledzepfilm, and a few other channels collaborated and made an almost 4 hour film from Zeppelin's 77 LA Forum shows. I believe they said it is nearly all the footage available from '77. It is really, really good and completely free, you just have to send an email to them (the address is in the pinned comment) and they'll send you a Google Drive link. If you're a Zeppelin fan you should check it out.