You all are still creating vids as 720p and struggling with zooming in and out so we can see what you are doing.
I think the cam being on the presenter/instructor at all times is probably a waste of space on the screen (when showing work being done the instructor is shown in a big square on lower right corner). You could (and should) exclude that when showing the actual hands on so you optimize use of the fullscreen.
720p just doesn't do well with screen capture type vids. the text is small and blurry and having to zoom in is a pain to the instructors especially when they can not type and such while zoomed in.
1920 x 1080 fullscreen HD is the way to go. All your competition is doing this so I strongly recommend it.