I just watched the Ehang video and was confused because the footage looked like they flew over Hetch Hetchy (00:16s in the video, recognizable valley/reservoir

I just watched the Ehang video and was confused because the footage looked like they flew over Hetch Hetchy (00:16s in the video, recognizable valley/reservoir in Yosemite National Park), considering I can't bring any motorized vehicles onto the lake my dog isn't even allowed there I was surprised they could do this. Further investigation reveals most of the footage is fake https://www.forbes.com/sites/ryanmac/2016/01/08/as-drones-take-flight-hype-may-set-unreasonable-consumer-expectations/#7a46782c71a6 https://www.forbes.com/sites/ryanmac/2016/01/08/as-drones-ta...