Sounds like an underlying issue with webrtc in your browser or the OS. You probably don't have a driver for the webcam.
Try google's
apprtc.appspot.com demo. If it doesn't work either, that would confirm it. If it does work, that would be "interesting"
On a side note, we have had success with an odroid-c1 running android. haven't tried it on an ordroid-c1 running ubuntu.