Valve has added a native gameplay recording tool to Steam (Beta version) so that you can more easily capture and share clips. The game recording feature is available now in beta — including on Steam Deck.
You’ll be able to both continuously record clips with background recording or manually turn on recording with a hotkey, according to Valve’s website about the updates. When you’re recording, you’ll see the “Steam Timeline,” and you can add markers to note interesting moments you might want to come back to later.
The tool won’t record your desktop, and you can pick which audio channels are included in the recording.
It uses the GPU without impacting too much on game performance, so this can be a lot better than running say OBS Studio separately.
See https://www.theverge.com/2024/6/26/24186716/valve-steam-native-game-recording-tool-deck