Look At The Clown: a child therapy program

Look At The Clown: a child therapy program is a three-minute video uploaded to YouTube by Ronald Yoder Sr. Entertainment on March 7, 2015.

Video
The video explains that his son is afraid of clowns and that this video is an experimental therapy program to help his son overcome his fear. The therapy is supposedly based on a real therapy by child psychologist Shirley Beverly French, but the image of Shirley shown is actually an image of actress Tilda Swinton. The video claims he will force his son to watch the video four times a day. The video is a slide show of images of real circus, carnival, and party clowns to a piece of pleasant circus music Every time an image is shown, a text to speech voice says "Look At The Clown". Between the normal clown images, the evil clown images flashes quickly and disappear. These evil clown images become more terrifyingly frequent as the video goes on. At the very end of the video, the voice says "Look At The Clown" one last time at the end as two images of the infamous clown serial killer John Wayne Gacy.

At least in this countdown is Top 15 Incredibly Mysterious Videos Found Online. It was uploaded by YouTuber Top15s Also it is narrated by Chills.

Links
NOTE : The following videos contains scary images that may not be suitable for young children!
 * youtube.com/watch?v=-zho1PIPPWE
 * Top15s: youtube.com/watch?v=JYbdpd6ZmXk?t=77