When watching some videos about neodymium magnets, I came upon a very interesting phenomenon. Namely, the maker of the video put a large magnet near an old CRT TV. At first, a big black spot appeared on the screen. This means that the electrons were repelled from from the magnet and didn't hit the screen. After that, he turned the magnet around and approached the screen again. This time, the electrons rushed to the magnet and created one illuminated spot, leaving the other parts of the screen dark. My question is, why are the magnetic poles of the electrons emerging from the cathode all lined up in the same direction and why don't they 'turn around'? When I approach 1 big magnet's south pole with some small magnets' south pole, the small magnets always turn around, exposing their north pole and are attracted to the big one instead of reataining the same position and being repelled.