*They're just getting started. Nobody knows who they are. I don't think that audience even speaks English.
*The audience knows who "Jimmy Page" of the Yardbirds is, maybe.
*They're tearing it up. Page even has his violin bow. There's something scary about how advanced their approach is before they even have any schtick or a polished road rehearsal. I don't think they ever got any more "Led Zeppelin" than this.
https://youtu.be/HJZHh-FiRz0