That does bring some memories back. The video is extremely good, but also the time line by scrolling down is very interesting. It shows acquisitions that I did not know about, and has ads that I haven't seen for a very long time.
Those strange, curved metal mouthpieces are the original CG-45 regulators the Cousteau team first used. Cousteau himself is the diver on the extreme left of the photo, and Frederick Dumas is, I think, second from the right. Cousteau and the other diver with the "X" harness appear to be wearing the two original three-cylinder Aqualungs too.