Have you had to keep going back to your desk to click the fullscreen button on Edrolo after it started playing the next clip?
Edrolo Helper (not affiliated with Edrolo) is an extension that automatically puts the video into fullscreen.
Simply click the icon, and when it's green, reload the page and any videos played on Edrolo will be in fullscreen.
Click the icon again to make it go grey, reload the page and it will stop fullscreening videos.
If there's any issues when getting out of fullscreen, reloading the page (after switching it back to grey) will help.