I'm friends with the one where he's linked to his other family members, so I assume it's actually him. There's also a like-fan page thing. If it is him, he's also a fan of Curb Your Enthusiasm.
I'm friends with the one this video is posted to, but that one looks a little suspicious since almost all that's on it is videos. Maybe the fan one also has this video.
You've probably seen Constellation Jodorowsky. He seems like he's always playfully trying to dismantle the overarching projections of his fans. You should also check out the Durch die Nacht episode with him in it: