It's all over Reddit. I'll paraphrase...
The dude in the car went into Paula's, ordered some donuts, then got questioned by the cashier why his mask did not say "all lives matter." The dude in the car then left without his food (He claims the cashier kept asking him over and over and he got tired of the conversation) and while he was leaving he told the Guy Fieri looking dude to put a mask on. Guy Fieri dude goes back to his car to get his mask and that's when the video starts.