YouTube

YouTube, LLC is an American video-sharing website headquartered in San Bruno, California. Three former PayPal employees—Chad Hurley, Steve Chen, and Jawed Karim—created the service in February 2005.

Basically it is an open site to be able to upload all kinds of video, as long as it follows the rules of the community.

Videos Screamer
Here was also where a wave of screamer videos came out, the most popular being K-fee commercials where in the end there's always a monster with a loud scream in range. Another screamer video practice is to put Regan MacNeil and also Jeff the Killer with flashing light effects at the end.

Because of this, there were many complaints and denunciations about these videos fakes containing shouted at the end, there even being reports of people who died of heart attack after falling a video with screamer, which caused YouTube to remove several videos that were fakes and they contained those screamer in the end, although many still create this kind of video.

Links

 * The Nun - YouTube Ads (an existing variation)
 * The category where you meet several YouTube screamers videos