alot of "lets plays" that are popular like markiplier, cinnaman toast ken, LordMinion777, and even pewdiepie dont play alot of brand new games. They play alot of indie games as well like slender games, horror games based off amnesia i think it is, minecraft and all that. Most the popular ones also have like a webcam thing in the corner that shows them as they play. Half the time being a little over dramatic at times, but it makes for a good watch. I did a couple lets plays under another name in the past and i didnt play the really popular games that are brand new. The problem with doing brand new ones as a nobody is that odds are no one will watch them. Most people go to the recorders that they already know and like anyway.