The airport video is a fake.
At :02 when the drone takes off, the grass beneath it doesn't move.
At :04 when the drone hovers briefly a couple of feet above the ground you should see the grass reacting to the downdraft.
In fact, nothing in the image moves BUT the drone. The "Airport" is a still photo. Note particularly the twin-engine aircraft on the taxiway.
At :21 the camera zooms in and everything appears larger except for the drone.
And the shadows are just wrong. At :16 notice that the shadow under the Beechcraft in the background is almost straight down below the aircraft, while the drone's shadow is offset.
And the drone is locked dead center of the frame. There is no way a cameraman can track a moving object with that kind of precision.
Here's the SAME AIRPORT with a model helicopter. Also a fake.
The video is a screen capture from a Phoenix Flight Simulator. not an example of someone flying a drone at an airport.
Second video, flying over 400 ft is not a violation of FAA rules. Stupid, but not illegal.
I'll give you the third one as probably a TFR violation: NOTAM 9/5151.