How to record my screen and webcam (desktop app)

In the desktop app: sidebar → "Studio" → "Screen Capture & Record". Pick a screen or window (or "▭ Select region…" and drag an area; hold Shift for exact 16:9), tick "Include webcam" and choose the camera, set "Microphone" and "System audio", pick a Resolution ("Source (native)", "1080p (1920)", "720p (1280)", "Vertical 1080×1920"), then "● Record". After a 3-2-1 countdown the window minimizes and a small floating bar shows the timer with "Pause" and "Stop". Stop opens the take in the Studio editor.

Recordings save to your computer only (nothing is uploaded), with the webcam and your mic on their own tracks. The Call Mode overlay is left out of the recording unless you turned on "Show overlay in recordings". If it refuses with "Not recording — webcam is ON but the camera isn't available", another app has the camera or it's unplugged; fix that (the preview should light up) and record again.