The repair video makes several suggestions, but sidesteps the issue I have.
The cartridge is stuck over to the side, where I cannot reach it. It will not slide into an accessible position. I can hear it try to slide, but I hear it strain, and cannot move.
Nothing on your repair suggestions seems to address this problem.
Power issues, re-start issues, plugging and un-plugging slutions have no use here, because the cartridge is stuck, right where it's supposed to stay when not in use. I cannot reach the print head, or any of the cartridges. They have all worked fine before.
There is no stuck paper anywhere in the printer that I can see. Three was no problem the last time I used it, so there is no paper inside to get stuck. That is not the problem.