Using the new built-in Chrome OS screen recorder is easy with this guide
(Android Central)

In previous years, Chrome OS lacked a built-in screen recorder, which forced users like us to go download third-party extensions or Android apps to use it. But it was clunky, a lot of steps, and it didn`t always work well, especially when done through Android apps. Thankfully, 2021 and Chrome OS 89 brought us a revamped screen capture menu, which took partial screenshots easier and also added in a native screen recorder. (Hallelujah!) This means that recording your best Chromebook`s screen is easier than ever because it uses the same buttons and menu as taking a screenshot on Chrome OS and gives us the option to record a single window or a custom area of the screen in addition to the good old-fashioned fullscreen recording. Here`s how to start and stop a screen recording on a Chromebook. How to record the screen on a Chromebook If you want to take a video rather than a still screenshot, that`s easy enough to do on a Chromebook now that Chrome OS 89 has rolled out to everyone. Befo...