Vertical video
Short-form is where most people will see your work.
It gets one second to earn the next thirty, usually with the sound off, usually on a phone held in one hand.
My approach to vertical is frame with the edit in mind.
Cut for the first beat rather than the establishing shot, and build for a viewer who is already scrolling.
The story instincts are the same ones I use in a fifteen-minute documentary.
There's just less room to be wrong.