I bet they had to cut the video that often due to very short battery life.

The flight technology is trivial, no joke, that’s a task every competent aerospace engineer can solve. But as long as batteries don’t get much, much denser energywise (by multitudes) those VTOL capabilities will suck every battery dry within a few (very few) minutes. Proof: This thing would already be on the market if it worked on combustion engines or turbines and simply be a helicopter.

Physics is the endgame. They can’t change that.