Congratulations with one of the greatest drones DJI ever made. You have already received good answers.
I have 4 of them, or actually two Mavic 2 Pro and two Mavic 2 Zoom (the only consumer drone with a zoom lens :-)
Fantastic flying cameras!
With your questions fully addressed, I would like to congratulate you on purchasing the most versatile DJI drone available. The geographical tethers and registration lockout booby traps that plague newer DJI drone models only kicked in after the...
Sorry, but the mountain you name Mount Everest is actually Cho Oyo (8,188 m.)
Everest is the peak on the far left in this screenshot from your video. It is much further away from your viewpoint.