Lyric discussion by afaf 

Cover art for Heavydirtysoul lyrics by Twenty One Pilots

I think the video also calls for an interpretation. It is using a dream-like symbolism like the singer is having a nightmare. He is sitting on the backseat of a car like he is not in control of his own life. The car falls apart and catches fire. The fire is spreading to the drum set. He is desperate and calls for his tormented soul to be saved. On the driver seat is a mystical black shadow who suddenly disappears. This might be a ghost or a demon. After the demon has disappeard, the singer stands up and escapes the burning car. His nightmare is over.

My Interpretation