I have been looking for a while now for a way to get doorbell/camera notifications on my TV. I had a setup that would change the TV source to show the nvr feed when a person was detected, but this would interrupt viewing.
I came across pipup and was planning on going this route but then at the last minute found TvOverlay. This is the GitHub:
I found this really easy to get setup, whereas I was kind of putting off pipup because of having to use adb commands etc that I am not really familiar with.
I’m really surprised there is no mention of tvoverlay in this community. All I could find were a few posts on reddit. I should say that I am not linked to this app in any way. I just found it really useful, easy to set up and it has great features. I hope it useful to someone else.