Crosshair and interactive hotspots

Hi there,

We're currently working on a VR concept. Our objective is to go from one video to another via interactive hotspots.

We would like to know how to create a crosshair, so that we can use that to focus our gaze on the hotspots, which would allow us to "teleport" from one place to another (from the Eiffel Tower, for instance, to the Arc de Triomphe - yes, we're in Paris). ;)

Also, how can we customize the time it takes to activate said hotspots, as well as the appearance of the crosshair and the hotspots?

Thank you kindly for your help,