Subliminals on the Prophecy video
So I just noted this appears barely at 0:01, at the very start, for just a couple frames. It looks like a sigillum or a face, really distorted with the VHS static and it inmediatly turns into a red hexagon.
At 0:07 during the Introit part, you can see the shadow of a cross, and the the sigillum comes back and it agains turns into a red hexagun for a couple of frames.
Then inmediatly the title cards "BOARDS OF CANADA".
After the "this program contains strobing and photopsychic stimuli" at 0:34 you see again the sigillum.
1:31 A church with a red sky, this one stays for just one frame, inmediatly before the priest.
3:05 God's speech start and so you can see the sigillum shaped inside a hexagun, however I'm not sure if this is the same sigillum as the one shown in the beggining.
I love that this album is about hell, the occult and crazy bitches following a cult and I'd love to know the origin of the sigillum, where does it come from and all that.