neowin[.]net/news/steams-new-recording-feature-will-let-you-capture-gaming-clips-using-minimal-resources/
The built-in Steam Game Recording feature-set lets players capture their games using either background recording for quickly securing highlight clips when needed, or manually using record and stop, both via hotkeys. Even the duration and quality levels can be tweaked on a per game basis, with a "Do Not Record" option being also an option.Using the Steam Overlay, Valve is also offering a replay option. This lets Steam users quickly rewind and scrub through their most recent recordings to see what happened earlier in their games.
Some games come with official support for timeline and event markers. Here, the recording automatically shows important events like kills, while also highlighting time spent in lobbies and menus to remove them easily from clips.
Steam Game Recording has been designed with the goal of taking as little computer resources away from the game you are playing as possible. It takes advantage of NVIDIA and AMD graphics cards to remove most of the performance cost of creating video recordings. When run on systems without those graphics cards, the systems CPU is used to create video recordings which may cause a noticeable performance impact on those systems.