I installed OctoPrint on my nettop (Foxconn NT-330) to control custom-built Delta printer. I also have generic USB endoscope-type camera attached to the nettop.
Basic setup went well, printer is visible and controllable by OctoPrint server. USB camera is visible via usb-list and mplayer can output live video.
The problem is that on the OctoPrint Webcam configuration tab it requires "Stream URL" which I don't know where to get from.