In regards to players with huge followers, there really isn't a way that we can stop them from participating or letting their fans know about the contest. You'll just have to do your best to ensure you're one of the winners Unfortunately you cannot I enjoy wub wub as much as the next guy, but due to them needing a license for commercial purposes we cant allow this particular channel's music to be used. The reasoning behind this is if your video is chosen as a winner we will definitely want to use it for marketing purposes. This is also the reason why in the official rules it says that any entries become property of Kakao Games. The winner for the previous trailer contest is actually featured on our Steam Store page. Hope this answers your question!