@Whag & @Carve please refer to the link I posted above both of your comments. Here it is again for convenience sake. Make sure to look for the android icon to differentiate whats for iOS and whats for Android.
Just wanted to share what I needed to do to get this working. It turns out my nest cameras were recording videos in an encoding that wouldn’t play in my notifications. I verified this by trying a different test video from another source and that worked.
So I wrote a shell command to run ffmpeg that coverts the file to mp42. This ended up getting things to work.