I first found Richard Hall's videos through a documentary he made on his channel that he split into 4 parts, "UFOs AND NATO The Human Mutilation Cover Up" and it's admittedly one of my favourite documentaries - the parallels he draws with these cases (he mentions eyewitness soldier accounts of crashed crafts with bloodthirsty Reptilian ETs) and how humans are being used as livestock by these malevolent ETs (the hikers' bodies at the Dyatlov's pass case were found mutilated just like cattle mutilations - a remote area in Russia 1959 and some hikers have eyes, organs, genitals and tongues missing, etc. everything cut with surgical, laser precision and no survivors, radiation was also found, etc). He makes a very convincing argument!
He also made a 4-part series called "The Host and the Parasite" and it's about Israel!
I feel like he's great (minus the David Kike vids he uploaded 3 years ago) but I've only really seen the human mutilation cover up documentary. I'm curious to hear any other opinions on the documentary though.
Here's his official channel: https://www.youtube.com/channel/UCQwCjFkhLbdpsu1xUDm7oGA