Detects built-in and USB cameras exposed by the browser. Plug in a USB camera and tap Refresh list.
Tap “Allow camera” to scan for video inputs.
Most Android phones do not expose OTG/USB webcams to Chrome or Safari — only the built-in front and back cameras appear in web pages. USB cameras work in the ReVision Android app (Settings → Camera → External USB), not in the browser PWA. On some Samsung devices a third camera may appear after a deep scan below.
Keep the USB camera plugged in, tap Allow, then Deep scan. Android needs an active camera stream before extra devices show up.