Good video.
To add, you can buy new wire pigtails from Toyota and other sources, but only replace them if absolutely necessary. What seems like a simple cut and solder is a royal PITA.
First off, the new wires are WAY thicker, so trying to twist two different sized wires together is not fun - the factory ones are puny. Then. since the wires are thicker, they don't tuck in the plastic loom as well as they used to.
Secondly, these wires have to make a U-turn to connect to the coil pack. So trying to cut the wires just the right length so one isn't pulling on your new connection is also fun.
Lastly, you are doing all of this while laying across the engine. Gives the back a real workout.
Al