Exact same thing happening to me, same specs also. This started happening recently, I had no problems a week or two ago.
I can't watch for more than 2 minutes.
After playing the video for 1 to 2 minutes, the Videostream tab on Chrome shows the Videostream Home screen ,instead of the video info and then in a few seconds the video stops and I see "buffering". I press on continue watching in Videostream, watch for 1 or 2 more minutes then the same thing happens again.
I am on Windows 10, Chrome Version 56.0.2924.87 (64-bit)