Not much happening here, not much new.
Jeff reviews restaurants on his YouTube channel, has an offer coming from the Food Network, and video records everything he does. He somehow ends up in a DNA database that says he has a half brother, Andy, that Jeff never knew about. Jeff meets Andy, who at first seems like a harmless weirdo but who becomes more dangerous the longer they hang around together.
Much of the story seems like filler--they hang around together so they go places and do stuff that make no difference to the story's outcome. They spend surprisingly little time critiquing restaurants' food. The ending is rather predictable and inevitable-you know what's going to happen, the question is how. This is a reasonable first effort by two new filmmakers, but it's ultimately pretty routine.