yes it does all that, Video not so well at the moment (mainly it’s to do with licensing issues I believe).
The core part means we don’t shove very specific things in there, i.e an FPS creator, cus not all games want that. Instead it provides you with generic tools to create, and doesn’t try and limit you in any way. There are a number of useful plugins (voxels, entity systems, decal, 2d physics etc), which some games may want and some don’t.
So you take the core engine and then add plugins you want, or create your own functionality (and release it as plugins for other people). There are some things that come bog standard though, like glow, fog, and a handful of materials, nifty-gui as well as built in bullet physics (some of these can be removed from the library easily if you don’t want it)