For example, rather than just a screenshot of the options menu for a given game, there should be tables listing all of the options and their possible settings. Rather than just an in-game screenshot, each UI element should be called out and detailed. For example, point out a health meter and explain what happens when the meter is filled, when it's low, etc. Same with the menus. What are the elements and what do they do? And so on.
There are also links to general gameplay footage for any given game, but various UI elements should have their timestamps called out, or even get their own videos entirely.
I really like how easy it is to navigate the site. Everything is tagged well. There's a lot of potential here.