Really people? It's a FREE YouTube video offering a simple and cheap way to EXTEND your wi-fi range. It's not gonna make your speeds faster. If you get 20Mbps then you will only get that (or close to) when you are directly plugged into the router. Wifi will get a little less, obviously. And if it works, then what's there to complain about??? Soda can, beer can, and other options are out there as well. Pick what works for you and go with it. Or spend the $30+ dollars on an outlet plug-in range extender. How about a simple "thanks" for this guy's creativity and for posting it. Hell, he even gives you cut-out templates!!
P.S. Everyone though the Wright Brothers "flying contraption" looked silly...until it actually FLEW. Then they refined it and kept making it better.... Kudos on making the "silly-looking" functional!