As the USB-C port is based on USB OTG and support both modes:
- Host mode: same as USB Host
- Slave mode: to connect PC, and VIMs device now like a USB disk
The USB-C is configed as Slave mode in all our official ROM, and if you want to connect a USB camera, should be Host mode, that’s the reason why it doesn’t work.
You can simply setup the USB-C working mode to support USB Camera.