@TeamYouTube I’ve noticed over the past 2 months my watch hours are decreasing. Is there a glitch in the system or is this happening purposely? 
It's normal to see fluctuation in the view count/watch time as it's a part of how YouTube validates views. Temporarily slowing down or even freezing a video's view count/watch time is expected, here are more details about why this happens and how it works: http://yt.be/help/Jgao