The flame power probe is the fastest.
I've been working on some designs to try to build my own power probe. I could use one that goes up to 36V for at work.
Your video shows that it's pretty simple to use, but I don't think any amount of simplicity is going to get a lot of mechanics and DIYers willing to even attempt troubleshooting electrical. For whatever reason it's just the ultimate bogeyman. I know several guys who do all kinds of car work but the second the problem appears to be electrical, or could be troubleshot with a test light they give up and take it somewhere. Multiple times I've talked to people having problems with their cars. I ask if they have a test light or a voltmeter and they grudgingly say yes. I say touch one end to chassis and the other end to the metal inside the connector. If it reads 12V your problem is this, if it reads 0V your problem is that. I talk to them a few days later and ask "So what did you find?"
Them: "Well... I tried the test you said but I didn't understand so I just replaced the PCM, and the coil packs, and the fuel pump and the ignition switch and the inertial safety and the battery. It starts and runs like a damn now though!"
Me: "Ooookkkkk..."
A few days later they are again stranded because it won't start.
I won't claim to be a mechanic or an expert or anything. But with the very basics you can troubleshoot things like what you've shown there. "My car won't start. No fuel pressure." Check the leads. Is there power to the fuel pump? If not then the fuel pump will not turn on no matter how many times you replace it!