How do you splice low voltage wire?

Quote from the video:
Quote from Youtube video: You need to put the iron to the object you're soldering. Let's get that on there. And start feeding the solder into the joint.

How do you split power wires?

Quote from the video:
Quote from Youtube video: Or splice the outer shield. And then grab the inside wires. And start splitting but once you get it opens like two wires are really needed as you grab one other tools to hold.

How do you make a cable splitter?





Quote from the video:
Quote from Youtube video: This cable line so this signal is now going to get split. Into two directions. So if i was taking a cable like this and splitting it to two different devices.