That video had creepy music, I didn't watch the whole thing.
Personally, I guess I don't believe in Scientology. Dictionary.com didn't exactly enlighten me too much about what it was.
I'm not sure if Agnosticism is really a religion. I'm mean I could see a person having the status of being unsure of God's existence for a long time, but for it to be a religion you'd probably have to think about your unsureness all the time. I don't see how you can firmly say, "I am an agnostic, and I firmly believe that God may or may not exist." It just seems too incomplete to be called a religion. No offense to Agnostics, God's existence is a really tough subject.
As for Atheism, I wish the word itself didn't sound so assertive. When a person says, "I'm an atheist", I always thought it sounded like that person must be looking down on those who believe in the existence of God. But I'm sure that's not the case at all. If you say, "I don't believe in God, personally", it sounds more normal. Something about the way "atheist" sounds is odd. No offense to Atheists either, it's your own choice to make, not mine. There's gotta be a cooler word for it, though. Like Seventh-Day Absentist or something. But I guess that would apply to all that don't go to Sunday church.