What is the problem?
When I startup octoprint,
sometimes the USB webcam will connect and show the video
and other times (mostly) it will not show anything other than message "Webcam stream loading..."
What did you already try to solve it?
Connect the webcam to a different usb port on octopi
Change power supply
Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ...)
OctoPrint version = 1.3.11
OctoPi version = 0.16.0
printer - wanhao i3
firmware = Marlin bugfix-2.0.x
browser = chrome
Pi model - Raspberry Pi 3 Model B Plus Rev 1.3
Webcam = Logitech QuickCam Pro 9000