There are more offensive videos than I can begin to list, but here are two that were linked from the Plastic Shamans documentary (which I listed under Good Videos).
"Queer Spirit Retreat":
http://www.youtube.com/watch?v=hwg4nNRxW00While I'm all for any oppressed group getting together and working their issues out, they don't have to do it at the expense of NDNs. This video, and their website, shows a bunch of non-Natives (mostly white dudes) talking about their use of "Native American Ceremonies" (including sweat lodge) at their for-pay retreats.
This one, "The Celtic Shaman"
http://www.youtube.com/watch?v=ffVXP-9B1rc is really horrible.
It's the Celtique Shameon. I am so f-ing sick of these white people ripping off NDN ceremonies, and thinking that if they call it "Celtic" no one will call them on it. It's disgusting. This guy has a bunch of white people banging on drums and shaking rattles in a teepee, in that famous from all the westerns
1234 rhythm, imitating NDN songs. I'm just nauseous after watching this one.