I've definitely noticed tons of Orb youtube content getting pulled in the last six months, which is a shame as there was some amazing vids available previously. A user by the name of purpleaspargus had some incredible stuff up there but now it is all gone.
Sounds like somebody needs to wake up to the realities of the 21st Century, instead of hording live shows that will probably never see the light of day (still waiting for the Brixton Academy set that I paid for btw!) it's a better idea to make it available for streaming to keep the interest in this music alive and spread the word to younger generations who would never find out about the Orb otherwise.
Can we at least get the brilliant live Oxbow Lakes from MTV back up? That was pretty much the best youtube ever.