With the help of this browser extension, you can get notified when a video is monetized for ads or if a video is removed from the ads channel. This way you can easily track what is going on, know when it happens and track the status of your video.

It can track the demonetization of any of your videos or channels and can notify you on your new demonetized videos in real time.

Take note that this extension cannot handle multiple YouTube accounts. So you have to track your pages one at a time to avoid confusing the program.