When i try to run example code from: https://webrtc.github.io/samples/src/content/capture/video-pc/
on Google chrome Version 54.0.2840.90 (64-bit) on Linux Mint, it's not working. Firefox works fine.
What's the problem?
I noticed the same issue and it seems like you have to enable "Experimental Web Platform features" in Chrome in order for the demo to work.
Unfortunately it still doesn't work properly, at least when loading the page initially. If I drag the player location though, it seems to work.