I read the description in the video. This individual bought a used machine 5 years ago and never cleaned it. That means it hadn't been cleaned in over 5 years. It's a testament to just how good Singer machines are that the machine worked at all! One should at a minimum brush the lint out of the machine now and then. Start to finish, that's a process that takes 5 to 10 seconds. One should put a drop of oil in the hook race at every two bobbins.