My first game had more than 4.5M views on YouTube, here's my strategy to find suitable content creators

Hi, I'm Oriol, the developer of The Ouroboros King. Streamers were by far what helped me the most in getting players to know about my game and I want to share my method for finding content creators suitable to any game.

1. Make a list of similar games. They should be at least moderately successful (otherwise streamers won't have played them) and released recently (otherwise the streamers who played them may have moved on to other genres)
2. Download streamer data for those games on Sullygnome or Streamcharts
3. Search for YouTubers who played those games either by using manual search (tedious) or using the YouTube API. Searching for creators on YouTube is harder than Twitch, but well worth it since in my experience YT offers more visibility
4. Build a database with the Twitch and YT data, that for each creator includes the average viewership, hours streamed and which games from your list they played
5. Select the best streamers. The two main selection criteria are streamer popularity (high average views) and fit with your game (number of games in your list played and number of hours played)
6. Find their emails. I first look at their Twitch description, Twitter profile, and personal website; before moving to YouTube's about section (which has daily limits)

I hope this information is useful to you. If you want more details, I also wrote a full blog post about the topic.

Cheers!