The video is super short which I love. So when it hits the glass in the front right corner - that's fine - at that point you want to turn the thumb screw clockwise (as seen looking from below into the screw) to pull the print bed down until it is no longer touching the glass and then back off until it is just barely kissing the glass.
Or you can use the calibration card or you can just use a normal thickness piece of paper - like printer paper - as a spacer. You slide the paper around while turning the screw until you get a certain amount of resistance (you decide) and repeat that for all 3 leveling points.
um3 support pages probably have a video.
-Edited by odjassemi
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