The point was that the whole "sand in your eye" thing and turning into one of them was all a red herring, the point was to raise the tension and danger for "the story" to keep people watching the video while it did its thing to the viewers brain, so that people would watch all the way to the end to find out the true way they spread, only for it to be too late by then.
The "Don't watch this" thing was reverse psychology to get people to watch it.
The "Don't watch this" thing was reverse psychology to get people to watch it.