Regardless of the stereotype 4chan gets, I've been a long-time user on there for quite some time; that being said, that's where some of the best information/leads I have come across, along with entertainment as well.

I had left the house for a while with my laptop charging, I get back home to grab a few things to head out for the evening and before I switched the server I was on and close out the chan tab in the background, I refreshed and seen this thread, which was titled Disturbing Youtube channels geared towards children

http://boards.4chan.org/pol/thread/116338212 http://archive.is/G1mxa

The videos anons come across and posted were disturbing, borderline NSFW, some content was NSFW imho so I am flaring it as such.

This is one video I watched that gives a very basic rundown from a anon reply on this thread: https://www.youtube.com/watch?v=8B1sRPwK248