Remember, if you're not a partner on Twitch, you won't have transcoding, so the experience could well be poor for viewers with slow connections. Here's how to adjust the settings in OBS.

The game must be open for OBS to see it; if you don't see your game, make sure it's open and click the Refresh button. Game Capture only supports DirectX 8, 9, 10, 10.1, 11 and OpenGL games.

OBS Studio is a great program for advanced users. It can be configured to your needs as a recording program and even create a professional-level final product for sites such as YouTube and Twitch.