This isn't my best shot, but it is another bullet. These pieces, if proven to not be an elaborate hoax, tell a definite tale. A bunch of shamanistic recordings found in a cave by a farmer?? Definitely showing alien coneheads and craft but- not that I can see at any rate- anything overtly connected to the spirit realm. I fail to see why a spirit being would require a helmet? I accept that the realm exists, but it is not being depicted on these artifacts...alienish persons are.
I guess I'll have to wait and see if this story catches on or not.