BimX was created to be seen on a iPad then on a android tablet so seeing a BimX on windows or OSX is not a good idea (possible but not the right way)
On iPad and Android you can do all you write : save a movie about your screen, look down when "flying", save points of view, launch a slideshow, measure, annotate, etc. ...
Here is all you can do :
https://bimx.archicad.com/fr/
Here is the bimX keyboard
And the way to share a bimX by any internet explorer :
https://bimx.graphisoft.com/