Is "random" usually used as a noun?
Yes, in English the term "random" is frequently used in its noun form. As a noun the term "random" means an unknown or unexpected person, and this is how it is being used in this particular clip. He's saying if you're going to give me some unknown people then I want to choose them. Ex: You can't make a whole TV show with just randoms off the street. Ex: I don't want to date just some random.