I didn’t think it would happen, but it did. Two of my videos were demonetized. Actually, they’re the same video, but on two different channels. They differ slightly in captions and the ending clip.
Why were they demonetized? I can only guess that the algorithm used to demonetize videos caught a key word in my video’s tags and description, most likely “passed away” or “pet loss.” However, looking at the terms of service, this video should be okay. What may trigger the demonetization is that they think it’s a sensitive subject or may not be advertiser friendly.
I have contacted YouTube to see if they’ll restore monetization for the video on my main channel. If successful, I try the same thing for the video on my vlog channel. They should contact me within a day, so I’ll update soon.