Teaching The Narrow Way: 15 degrees per hour, globe vs flat earth video critique

I am not endorsing or refuting flat or globe earth by saying this. However I would like to point out a possible error in this video. He claims everyone can agree they see the sun shift approximately 15 degrees every hour no matter where they stand on earth. But in the north and south poles there is continual light or darkness for multiple days at a time. This makes me suspect he is wrong in his premise of the approximately 15 degree shift per hour being true everywhere in the world. I doubt it fits this pattern during times of continual daylight, although this would not necessarily be impossible because

1 the axis of rotation (the vector perpendicular to the rotation) can itself rotate

2 a change of negative 15 degrees per hour or positive 15 degrees per hour are both 15 degree per hour changes although in opposite directions, if the speed was constantly approximately 15 degrees per hour but the direction occasionally flips to the opposite direction this could prevent sunset or sunrise.

3 the sun appears to travel up starting in a location East of the observer at sunrise and then down towards a location West of the observer at sunset for people close enough to the equator but there also maybe a North and South component depending on your location and the sun could not always be pure East or pure West in its direction of apparent travel. The sun could rotate in the direction perpendicular to up without changing elevation enough to end continual daylight for periods of time longer than 24 hours near the poles. That is instead of appearing to primarily move up or down for someone as close to a pole as possible without being at a point where north, south, east and west are undefined or unclearly defined the sun could move around to appear north, south, east or west of the observer at different times of day without changing or with little enough change in the angle of elevation to break continuous daylight for long periods of time.

In short the video maker should have defined more clearly what he meant by angle. I am skeptical that the angle of apparent elevation changes at approximately 15 degrees per hour at every 1 hour interval and does not depart from that rate a practically significant amount for individuals on or near the poles. He should measure two angles for the sun not only one angle although a single angle can be used if you create a new coordinate system that is constantly shifting relative to another coordinate system.

He does have an interesting point that should be considered in the debate of the earth 's shape but needs more mathematically rigorous definitions of his coordinate systems to explain to his viewers. More rigorous than what I have done in explaining this.

Copyright Carl Janssen 2018

Antarctica has just two seasons: summer and winter. Antarctica has six months of daylight in its summer and six months of darkness in its winter.

https://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-antarctica-58.html

https://web.archive.org/web20150729235203/http://www.nasa.gov:80/audience/forstudents/5-8/features/nasa-knows/what-is-antarctica-58.html

Is rotation a vector

http://farside.ph.utexas.edu/teaching/301/lectures/node100.html

https://web.archive.org/web/20180817031943/http://farside.ph.utexas.edu/teaching/301/lectures/node100.html