Don't just watch the video only, click the "YouTube" icon on the right bottom screen and read the comments!
https://www.youtube.com/watch?v=bHIhgxav9LY
The Big Misconception About Electricity
This vid goes quite a ways down the road to explaining why:
1) Power cords make a not so subtle difference.
2) Cable elevators should not be looked at askance.
Regards, barts