I'm trying to play back .mp4 videos that have chapters embedded in them. They play fine on desktop players like VLC, and on my iPod, but I can't select/choose/jump to these chapter markers on Android. What am I missing?
It's likely because the player app you are using is not aware of the embedded chapters. I recommend searching Google Play Store for video player apps that support this feature.
Try to use VLC for Android. :)