A great resource for Zep live recordings on Youtube is channel from Led Zeppelin Boots. Two days ago the guy posted a video of the whole Earls Court show from 5/25/75, the famous Buck Rogers Show. The name is a nod to one of the first boots of the show from the Tarantura label that appeared and to how they played, where the group blasted off during the Song Remains the Same, playing it about 20% faster than normal. Pure adrenaline rush.

Anyway here is a link to video having most of the show, except for copyrighted songs like Stairway that appeared on the official Zep DVD that was released some years ago. The playing is exceptional and so is the sound quality. With Zeppelin having recorded themselves very few times, this being the only time from '75 in addition to the other EC shows, the concert is real gem.

https://www.youtube.com/watch?v=Ruk2nMCFqQo&t=2385s