If all of this Illuminati symbolism is so important, then why didn't he go the extra mile of downloading the actual episode instead of just pointing a camera at a TV?
The funny thing is that Gravity Falls is, in fact, packed full of references to the occult and the supernatural (including its own made-up coded language) but that's because the people behind it actual give a crap about the show and pack in all these details for fun.
Can you imagine the illuminati halls, filled with crude drawings of phalic objects everywhere? Members laughing in corners while some angry guy is cleaning a "captain dongman" picture in the wall.