Starise
If you believe Youtube 
There are enough creepy vids on there to keep you perpetually scared for life.
Some of it falls along the lines of a cult thriller.
I've been following a series of lectures by a Rabbi for the last few weeks, watching his playlists.
For a reason unknown to me, YouTube insisted on suggesting one of those anti-Semitic, nut job conspiracy theory videos. Every time I loaded the Rabbi's playlist, that one video with the Star of David and the 666 across it came on top of the list, the rest of which obviously consisted of lectures by the same Rabbi and similar.
I swear that every single time I finished one lecture and started the next, that same video came on top, 9 out of 10 times. And that one out of ten times it wasn't on top, it was second or third.
The funny thing is that there was no way for me to get rid of it - even after I gave it the thumb down and block the user, it just kept coming back. If I were a conspiracy theory type of person, that could have been an opportunity to start up my own theory about YouTube...
I finally contacted YT and even though they didn't get back to me, that clip has since magically disappeared.
Nevertheless, before it did, I obviously went and saw the suggested clips for that particular video. Man... Creepy doesn't even begin to cover it. It's pretty much hopeless.