I watched your video. My dishwasher was top mounted. I also had to lower the feet to allow the dishwasher slide out. I had to disconnect both the water inlet and the drain hose under the washer before pulling out. After doing those steps, and getting the dishwasher pulled out replacing the track assemblies was 4 screws each side. When pushing the dishwasher back into place I got a little confused as the top mount holes for the screws disappeared. Kitchen has corian counters so their was a strip of wood under the bullnose buildup on the corian edges that had gotten pushed back when the dishwasher was pushed back into place. I had to lower the front legs of the dishwasher, reposition the strip of wood and then push the dishwasher back into place. But a relatively easy fix. I also had to remove the little ball bearings that had come out of the old dishrack track assemblies and gotten into the spinning water things both in the top one and the bottom one, A magnet was needed to catch them in such a difficult space.