Because creativity dawned with the smartphone?
Vertical video is lazy social media behavior. My eyes are horizontal. The horizon is... horizontal.
My desktop display is horizontal. My laptop display is horizontal. My iPad is horizontal except when I’m reading certain types of PDF documents. I type on my phone horizontally. Every movie I own is horizontal. Just about every viewing device made from the dawn of moving pictures has been somewhere between square and horizontal.
Everytime I see someone film vertically and then pan wildly around, I’m conflicted between wanting to scream at the screen and needing to suppress motion sickness.
Vertical is fine for a narrow range of images and video, but don’t pretend it’s a creative explosion. It‘s people too lazy to hold their phone with both hands because they know social media isn’t worth their best effort.