In Chrome Canary (at least on Windows), if I start tracing (I select Rendering category), and then go to youtube.com, select any video. When the video starts playing, I click the fullscreen mode button.

Then Chrome no longer updates (the video doesn't really go into full screen mode) , and if you press Esc, the video goes into full screen mode now (weird), but then the window freezes again. Nothing I do from this point can unfreeze the window.

I tested in Stable, and there is no such issue.

(I tested on two Windows laptops, and both have the same issue)