Defunctland's Disney's Fastpass: A Complicated History is a fantastic dive into the logistics of managing a giant crowd over several years, from approaching it as an engineering problem all the way to exploiting the system for profit. It's such a fascinating problem to me, and it's presented in an engaging and fun way. The rest of the channel is fantastic too!
I'll also recommend Fascinating Horror - these aren't fictional horror stories, these are real disasters told in an incredibly detailed but highly respectful way. They don't just explain the disaster and why/how it happened, but also the regulations that came afterwards to make sure these would never happen again. They're all high quality, but if you want a starting point the Nutty Butty Caves will give you a good idea what the channel is about.
I've only been thinking about the implications of faking a celebrity's voice - personalizing it like this makes me sick to my stomach. Had no idea it's already that easy. I don't think the voice would even have to be that realistic - if they're faking a life threatening situation, my first thought isn't going to be "Hey, their voice sounded a little off". Absolutely horrifying.