This guy is a false prophet, he says:
"I'm only teaching the Bible. I'm telling ... this is what the Bible says."
Except, no where in the Bible does it mention the date of the end of the world. If he actually reads the Bible he would know that no one knows the date the world will end, but it will be a spontaneous decision by an act of God. No angel, human being, or Jesus himself will know the day or hour. These are truths in the Bible (regardless of what you believe in, just saying this is what the Bible says). There is no date.
The people who follow this guy are people who have never read the Bible, and need someone to hold their hand through believing something.