Having a video that had pretty much the same amount of views(10000-12000) per month for 4 years straight, and then go down to 5000 in the last 28 days, does seem a bit odd though. To be precise, the video had 142,517 views within the last 365 days(which is around 12000 per month) but since demonetization it took a nose dive like a plane without gas.
It had 1000 views the last 7 days. That's not even 5000 per month. All my other videos all have less than half the views that they had before demonetization. I find that quite DE-motivational.