Rl glider pilot here - current CFD models thermal very incorrectly - practically all fundamental properties of thermals are incorrect - incorrect (that is no) spatial relation to clouds of “ground thermals”, incorrect thermals distribution, incorrect thermals shape and size (like visible in your video) in RL thermals converge to the highest lift thermal core so they are not like a “whole city rising”, ground doesn’t produce rising airmass as depicted, only tightest core of around 500m diameter provides lift usable for gliders (only very near the cloud bottom would be sometimes wider) at the outside of thermal you would experience rotors thus downdraft, thermals shoudn’t also be constant - rather periodic, strong lift wouldn’t be laminar, rather abrupt and create more vortexes when passing through surrounding air.
Well, with incorrect thermal model everything - even a rock can be a glider, so why not a helicopter.
It is so much different than RL it is hard to call them thermals - rather some fantasy about rising air. Hope for next update they will listen to glider pilots feedback and change the model.