Technical
Green screen (chroma key)
A green backdrop that software removes, so only you appear over the game. The effect is called chroma keying and it's built into OBS.
Related terms
- Source
One ingredient inside an OBS scene: a game capture, webcam, image, browser overlay, or mic. Scenes are just stacks of sources.
- Overlay
The graphics layered on top of your gameplay — webcam border, alerts, recent-follower box, chat box, etc.
- OBS (Open Broadcaster Software)
The free, open-source app most streamers use to broadcast — it captures your game, webcam and mic, mixes them into scenes, and sends the stream to your platform.