Why no camera app sees it
Most cheap USB endoscopes sold with the UseePlus app are not webcams. A webcam speaks the standard USB video protocol (UVC), which is why Photo Booth and QuickTime know what to do with it. These endoscopes speak their own protocol instead and announce themselves as a generic vendor device, often named "supercamera" or "Geek szitman supercamera". macOS lists it in System Report and then has no driver for it, so every camera app reports "no camera".
You can confirm this in a minute: Apple menu, About This Mac, System Report, USB. If the device is there with vendor ID 0x2ce3 and product ID 0x3828 (or 0x0329 / 0x2022), it is one of these. If it instead shows up in Photo Booth, it is a normal webcam and you don't need this site.
What about the UseePlus app?
The maker's Mac app exists, but its App Store listing requires macOS 11 and an Apple-silicon (M1 or later) Mac, so it does nothing on an Intel Mac, and many people would rather not install it at all.
View it in Chrome instead
- Plug the camera into the Mac (any port; a USB-C adapter is fine).
- Open the viewer in Chrome or Edge. Safari cannot do this: it has no USB support for web pages.
- Press Connect camera and pick "supercamera" in the list Chrome shows. That permission is remembered.
Live video starts within a second. Photos are saved as the camera's own JPEG files into a folder you choose once; clips are WebM. Nothing leaves the Mac.
If it still doesn't connect
- "Another program has the camera." Something else holds it: the UseePlus app, another Chrome tab, a viewer you tried earlier. Quit it and press Try again. More on this.
- The camera isn't in the list. Try another cable or port; a few extension cables drop the device. Check System Report again.
- Black or very dark image. Turn the LED wheel on the cable up; the LEDs are controlled by that wheel, not by software. More on brightness and noise.
Try it
Open the viewer Chrome or Edge on a computer, or Chrome on Android. Nothing is uploaded.