Does your extruder have a offset in xy? Looks like it from the video so that is ok. You should go more down after homing to make sure the left endstop is not hit when selecting the extruder. I always set z back on home to 50mm. Printing in top height is nearly impossible as objects must have very small size and be exactly at center to be printable.
Distance to endstops after homing must not be the same. That depends on your printer geometry and hall sensor sensitivity. As long as my test G28 G1 Z100, G131 works everything is fine and you can start calibrating the printer. Till G132 you have only calibrated homing position.
what is "perfect impression tray test"
what does "where does the calibration problem of the plate 10 mm" mean? I guess you have not calibrated geometry but without information I can not say.
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