An email request for more information regarding this video brought the following reply from the person who uploaded it at youtube.

The film was made on Memorial day, which was on a Monday, May 28, 2007 sometime in the afternoon, possibly around 3 & 5:00. This happened at Beacon Rock State Park in Washington that weekend. I was several miles deep on a horse trail when I heard branches breaking to the left of me. In the vicinity of the sound, there was a burning tar smell mixed with what reminded me of rancid milk. This caused me to follow in off the main trail. About 100 yards away I saw a large animal of some kind. My thought was that it was some type of bear. Its all solid dark color made it stand out amongst the plant life. That is when I recorded this animal on film. It had no trouble traveling through the thick vegetation away from where I was standing. I kept my distance because I did not want to endanger myself. When I lost sight of the subject through the viewfinder I turned off the camera and headed back.toshears