That tube has a heater wrapped around it to keep it from freezing up. it's probably failed. Replace the entire assembly ( order it with the heater installed around the tube), and reassemble the ice maker to the freezer compartment.
Your refrigerator looks used. If so that’s why the fill tube is so messed up and the two front screws are missing. If by any chance it’s not used I would take it back and show them so you can get a new one. Thanks for making this video.
You were sold a used refrigerator, your problem is a bad water fill tube. You also need the two front screws that you are missing. They hold up the ice maker.
