Shorts safe zones for captions

The Shorts player covers the bottom of your video with the title and channel name, and the right edge with buttons. Text under them is lost.

What works

Keep key text in the middle of the frame.
Captions at least ~3% of frame height.
Keep faces away from the right edge.

Your story idea

In the app: full beat-timed scripts, loop endings and a pre-publish Short Check.