The picture you say is Trump sitting toward the front of Air Force One appears to be actually in Marine One. Compare the interior furnishings here:
https://en.wikipedia.org/wiki/File:Obama,_Clinton,_Gates,_Jones_and_Mullen_in_Marine_One.jpg
Also not the perspective view of the fire engine out the window. The angle is much too low to be taken from a seat in Air Force One. And the wing should be visible unless he is in a rear-facing seat.
The direction of acceleration is always toward the center of the earth, not along a tangent, therefore, it is always changing direction relative to the universe, but it is always downward to us.
Thank you.
Q might very will stick with the "AF1" designation for any of the President's aircraft to avoid confusion; it is less ambiguous than "M1".
Technically the designation "Air Force One" is only used for an Air Force aircraft; "Marine One" for a Marine aircraft; and "Executive One " for a civilian aircraft. (See link below)
https://en.wikipedia.org/wiki/List_of_official_vehicles_of_the_President_of_the_United_States#Aircraft