Not to get all pedantic on your ass, but he had a porn stash. Ron Jeremy, among so very many others, wore a mustache that was so endemic to the industry that it came to be called a porn-stache (and it's never a compliment). ObL had a full beard, which doesn't count as a porn-stache.
Personally, I truly couldn't care less who viewed the tapes in question, as ObL had several wives and at least a few sons (that I'm aware of, and hardly an ObL expert). The idea is to cut a "spiritual leader" down to size, at the very least humanizing him by claiming that he consumed something not just outlawed by custom and Sharia law, but something so completely a product of the West he seemed so hell bent on destroying.
Personally, I think this, while remotely possible, is actually a CIA disinformation exercise meant to discredit ObL: not here in the West, but throughout the Islamic world which formerly revered him.