Scary Spot the difference - Medium

Scary Spot the difference - Medium is a screamer video made by wherehasthedaygone (Michael Robinson). The video has accumulated over 145,914 views since its upload in June 2007.

Video
It starts with a Windows Movie Maker intro stating the following:

"There are 5 differences in the pictures. See if you can spot them all (Hint the 5th is in the bottom right, look closely)"

Twoism by Boards of Canada plays as the we are then shown two images of a black dog (the uploader's dog [who's named Dexter], as said in the video's description) wearing a blue hoodie. Unlike other "Find the difference" screamers, where the two images usually have no differences, the images here do actually have some. However, contrary to what the text at the beginning said, There are 4 differences, not 5.

In the image on the right: the white spot on the dog's neck is missing, the glass decoration in the back is slightly colored differently, so is one of the Rubik's Cubes on the dog's hoodie, and the horizontal line at the top of the window in the back is missing,

After 30 seconds, an image of a black guy with a wide-open mouth and bulging eyes (the same screamer image that was used in I like bread) pops out, with the same scream from Scary Tic-Tac-Toe played three times.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=wwVTID9UVKY