The diagram below is based on the video you watched above. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects.

Double 4 Way Switch Wiring Diagram Diagram Base Website
Four way electrical switch wiring diagram. For complete instructions on wiring a basic 4 way switch see our wiring a 4 way switch article. As you will see most 4 way switch wiring is placed between the wiring of two 3 way switches therefore a 4way switch is installed with two 3way. The switch can be used to control the electricity supplying lights from three locations. It can get crowded with so many wires in the ceiling box so you must use a larger size electrical box to be code compliant. To view it at full size click on the diagram. This diagram is a thumbnail.
Four way switch wiring instructions inside the switch packaging it is possible to bring all of the wiring into the ceiling light electrical box and wire your 3 ways and 4 ways from there. It has 4 terminals or poles and consists of two 3 way switches that are modified. 4 way switch wiring 4 way switches provide switching from three or more locations. The 4 way is used when you want to control the light or lights from two or more locations. Click here to access note. If more than three switches are needed simply place more 4 way switches between the three way switches.
What is the black screw for on a 3 way switch diagram. The black screw on a 3 way switch diagram is for the continuous hot wire that comes from the circuit. A 3 way switch wiring diagram is a simple drawing showing how to connect the wires to each of the four screws on the 3 way switch. A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch. Look for 4 way switch wiring diagram or step how to wire a four way light switch electrical circuit a 4 way switch is a double pole double throw dpdt switch.