Yeah, I think DIY is great, but I’m not 100% on board with modifying devices that run on 120VAC or 220VAC. There are a lot of people out there who might see that and think, “Yeah, I can do that too,” without fully understanding the risks. Personally, I think sticking to low voltage is the better and safer route.
For example, I can easily build a 12V circuit using a 12V alarm output to trigger a siren or even a warning light. After watching your video, I actually threw together a quick 12V setup that someone could keep in their security room or any room they spend most of their time in. That kind of solution is much safer than modifying anything running on high voltage.
I mean, sure I do power supply repairs and work on live voltage all the time, but I’m not your average user. I’ve been working with electronics for over 50 years. I even still have my very first Amcrest radio alarm clock that I fixed back in the '70s. (Now you know why I like Amcrest so much! Same name, different company though, lol.)
Anyway, using a 12V camera output for DIY projects is just a safer bet all around. Not everyone out there is an electrical engineer.