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Not sure how far you've got with setting up this printer or whether this is a new problem when the printer was working previously. However, from the video and what you were doing, it looks to me like the bed clearance has not been adjusted before homing. If you are initially setting up the machine, screw down the bed adjusting screws until they're all fairly tight. This will give you maximum clearance between the nozzle and bed. Then home the printer. The Z limit switch should be hit and activated before the nozzle hits the bed. The X and Y axes usually home before the Z so if the printer isn't homing them first, check the endstops. I'm not familiar with this exact printer but it looks like a typical i3 design. The X axis is definitely homing, but not sure about the Y. Usually it homes X and Y just off the bed but if your design homes on the edge of the bed, you will need to set up the Z clearance, otherwise it'll keep hitting it and you're gonna bust things.