For videos, it depends upon what you're trying to do. Google:replace ribbon cable connector flap - Google Search If it's loose even when the flap is fully closed, you may need to add a strip of paper or plastic on top of the cable to make it fit more tightly. If the flap doesn't close properly, that's a different issue. For tape, even regular electrical tape would likely be okay since it's not in a high heat area. That tape is good to 80° C. For higher heat locations you would need special heat resistant tapes. How could the cable be too short? Is it the original cable? If it is, then it cannot be too short. If the touchpad previously worked, then the cable is not too short.Did you replace it?  Check the contacts at the end of the cable. Do they look perfect? If they look chewed up or some of the metal strips have shredded or folded back, then you would need a new cable. You could check with Parts-People.com to ask them, though they don't have a touchpad in stock for your model. You could ask about just a cable. You could also ask Dell, if it's a relatively recent model. I made both suggestions in my first post.
Hello, i got an Vostro 5402 but my Touchpad its not working and i run a Diagnostic to find the error, its saying the cable from the Touchpad is not working... i opened the Laptop and the cable seems fine, the little "black lock" where you put the flatcable was a little loose but maybe the problem is the cable? Error code 415
Vostro 5402 not working the touchpad!