The easiest way is to make a horror game, and then youtubers will probably pick it up. I made a horror game in a few days with 70 lifetime view, but even with that small of visibility, it still got picked up by a youtuber. (albeit a small one, but there's very little chance you're getting a big streamer to play your game) Or, you could try contacting the youtubers by email. (Check the youtube channel info) Note: you probably will need a press kit for this kind of thing since it helps the youtubers make things like thumbnails, and that is important when their are thousands of games to choose from. It also is important to have a game that looks professional, because it is hard to convince someone take the time to play a game that looks terrible and is boring/short. (remember, they're looking for content) I hope this helps.