I just obtained a Chromebook and have been trying out ITProTV on it, in fact watching some of the Google Apps/GSuite videos.
It works really well except for a minor annoyance that in full screen the cursor doesn't disappear as I'm sure it does with Chrome on Windows 10. You can of course move the cursor to the side but you can't drag it completely off the screen.
I've found that pausing with the space bar and then playing again causes it to go away so does as a workaround.
Perhaps this could be looked at next time the player is being updated?