To expose the above menu, mouse over the bottom of the video window.
Videos are not displayed in full screen at the start.
All videos, with sound, have Closed Captions (subtitles) enabling a full understanding of the videos without sound.
Sections allow you to jump directly to a part of a video as well as giving an overview of the video contents.
You can return to the main menu at anytime by clicking the red "Click for menu". You can also use your browser's "Back Button" to achieve the same result.