What is a webcam overlay (facecam)?

A webcam overlay places a picture-in-picture camera feed — usually the presenter's face — on top of a screen recording. It is a staple of tutorials, course lessons, gameplay commentary, and product demos, where seeing a real person builds rapport and holds attention better than a disembodied voice over a screen. The overlay is typically a small rounded rectangle or circle parked in a corner, sized so it adds a human presence without covering the important parts of the screen underneath.

Technically, a facecam is a compositing operation: the camera video and the screen video are recorded as separate layers, then merged into one frame with a chosen position, scale, and mask. Some tools capture both streams simultaneously and burn the overlay in during recording; others keep the layers separate so you can reposition or resize the camera later in editing. Creators often add a soft shadow, border, or shape mask to make the overlay feel intentional and distinct from the screen content behind it.

Limelight does not capture a webcam, so it does not produce a built-in facecam overlay; it concentrates on making the screen itself look great with auto-zoom, cursor smoothing, on-screen keystrokes, and a clean background. If your video needs a presenter overlay, record your camera with a separate app and layer it over your Limelight export in a video editor. That keeps the screen capture crisp while still letting you add a personal, on-camera presence.