Hi Jon, thank you for the tutorial, I followed the instructions and it works.
I can see an USB camera connected to a Raspberry PI from another Raspberry PI in the same network.
lsusb shows the device connected to the other rasp :

pi@raspberrypi:~ $ lsusb
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 003: ID 0c45:62c0 Microdia Sonix USB 2.0 Camera <===

When trying to open the video stream from VLC with device /dev/video0 I get no video.
Any idea where the problem can be ?
Obviously if I connect the camera directly to the USB port I can see the video stream.