The Cathars were definitely heretics. According to their Wikipedia entry:
Cathars saw matter as intrinsically evil, they denied that Jesus could become incarnate and still be the son of God. Cathars vehemently repudiated the significance of the Crucifixion and the Cross.And to put icing on the cake, they criticized the Pope's high-life style.
The video ties in with the end of the world date, Dec 21, 2012. If you are interested in the Cathars pick up a good book. The video reminds me of the Da Vinci Code.
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