That blog is quoting from a Seattle newspaper article without linking to it, here's the link to the article:

http://blog.seattlepi.com/thebigblog/2012/10/31/who-is-seatt...

The newspaper article is quoting from the photography is not a crime blog:

http://www.photographyisnotacrime.com/2012/10/10/creepy-man-...

http://www.photographyisnotacrime.com/2012/10/30/creepy-came...

According to photographyisnotacrime, the original youtube Creepy Cameraman uploader was itsrighttherenow which has been deleted for copyright infringement.

Here's a google cache of his youtube page:

http://webcache.googleusercontent.com/search?q=cache:6OBvqhK...

That's as far down the rabbit hole as I could go to find the original source of this story.