They should recruit people on Reddit for this. A large number of them seem perfectly fine with this type of content. There are dedicated communities to all these things. I do not mean this as a hit against Reddit users. It is just that there are small pockets of people who are psychologically capable of tolerating this or even enjoy it. It seems more ethical to hire people from /r/watchpeopledie.
I'd wonder if frequents in these subreddits are typically professional and healthy people to have on a team, though (honestly no idea, never been). It's a strange conundrum because ideally you want good people who are comfortable watching things good people rarely want to watch. Don't have much experience with this demographic -- maybe there are more sane, emotionally healthy people watching snuff films for fun than…
I found most of the videos less offensive than extremely graphic horror movies, which ironically I have less stomach for. If anything that subreddit made me generally more aware of my surroundings and safer in my daily life.