That's pretty funny. Paul on the plane went to Tahoe, accurately measured the curvature of the Earth and then proclaimed it meant the Earth was "less convex" than round Earth theory. But he was wrong.
The comment from WarHoover goes over the math in detail.
For this video: at first, he misrepresents the Tahoe video and says he shouldn't have been able to see the casinos. He shouldn't have been able to see the BOTTOM of the casinos, and he didn't. He only saw the top of the casinos.
Then he misrepresents or misunderstands how phone orientation sensors work. They aren't fixed-in-space gyroscopes, they are accelerometers.