"Zoom" is the program Cubigo uses for video calling for video consultations. The program is free. To download it go the app store on your tablet, via https://zoom.us/download#client_4meeting, or after you have opened the Video Consultation click on the link to save the program.
The installation will run automatically.
The Zoom manual can be found here: https://support.zoom.us/hc/en-us.
Zoom makes use of pop-ups. This is how you enable them: