There is not enough rotation of the throw out mechanism in your video. Take the cover off or loosen it up a lot and see that the cable and lever will actually rotate the crank arm I'd guess nearly 30 degrees. You should be able to take the cover off the engine and see the amount of horizontal motion the throw out mechanism has. Hold the cover so you are looking at the mechanism from the bottom (like you were looking straight up from the floor if it was installed) and while holding the cable in place manually operate the clutch lever. You should plainly see the throw out move about 1/8" straight toward where the push rod would align. If it doesn't, you'll have to figure out why. The spiral cam can wear, but your video looks like the cable is not turning the crank far enough. That could be because there is a mechanical problem with the clutch itself, but pull the cover off first and make sure the throw out mechanism has enough travel first because it is easier to check. It is unlikely that you have extra plates in your clutch, but it could cause the springs to bind if there were. I think there are 7 friction plates and 6 steel plates, but that is just from memory. Regardless, I don't think it is possible to have the wrong number unless it is a single steel plate because one pair less and the stack will obviously be loose, and an extra pair will not allow the pressure plate to go on without binding the springs. The first and last plates are friction plates and the steel plates only go in between two friction plates. If you think the lever, cable, and throw out mechanism are ok, put all that back together and take off the right side cover and watch the pressure plate as you operate the clutch lever. If you don't see something like an obvious 1/16" ish motion, try loosening all the pressure plate bolts (the ones with the springs under them). Loosen them up evenly. If that allows more motion, the plate stack is too thick for some reason causing the springs to bind when you try to engage the clutch.