Stadia was a Squandered Opportunities masterclass. That platform had SO much potential; the tech was there, and the tech worked, but Google hired the worst possible person to run the project.
He is unstable and dangerous. Killing animals is a universal first indicator of future violence against people. Don't take his threats lightly, even if you parents seem to do so.
If you don't want to call the cops on him (which, IMO, you definitely should), then you should be prepared for the worst. And by that, I mean arm and steel yourself for the worst case scenario. There is a non-zero chance that he'll put you in an it's-you-or-him situation.
It won't be your fault if he puts you in a situation where you have to put a permanent end to his threats. It'll be hard to live with, but you'll still live. Which is why I recommend letting the police deal with him, instead.
It's hard when it's family, when it's somebody you grew up with and still have love for. He's broken, and it's not your fault he's the way he is. Nobody can help everybody, but you can still help yourself.
Search engines haven't worked reliably for several years now, the top results for almost any search are from social media pages that you can't even read without an account. The Internet is broken.
The wild part about it is that this technique required a very specific prism in the camera in order to work properly, and the tech behind it was completely lost to time and nobody else knew how to make that work, which is why we've primarily had blue/green screens with chunky matte lines ever since. The guys at Corridor Digital managed to recreate the effect pretty authentically, and it's awesome to see the results of their work: https://www.youtube.com/watch?v=UQuIVsNzqDk
Here's to hoping that lightning strikes twice, then. 🤞