DEMA represents depression, and Clancy escaping Tyler overcoming it. The guy in the horse in the video was...well I'm not settled on that yet. But I think he was trying to make Clancy into Blurryface because Blurryface is what a proper DEMA citizen is. But Clancy escaped with the help of the people on the cliffs, who people are saying are The Clique, Josh, and Jenna, which I agree with.

So Clancy is the light side if Tyler and Blurry is the dark side, like Ying and Yang.