Um... Have you ever seen a vertical video before? I’m sure you have and that is all you need to know. No secret insider memes necessary.
Yup! I take them all the time. Just 3 days ago I took one of wild baby geese frolicking on the grass near me, while some others swam out in the pond beyond. I did it vertically so I could zoom in as far as possible on both groups and have them together in one clip.
And often when I want to slow pan from L to R over a tall scene, where I'm unable to back up to capture the entire height in landscape mode, I pan in Portrait / vertical mode. Believe it or not, this way actually turns out much better than holding the phone horizontally and moving it up & down repeatedy while panning, thus simulating a cameraman on a trampoline.
But obviously you know a lot more about my vertical videos than I do, making you a Master of Clairvoyance. So I see I will have to go rerun them over & over to figure out what exactly I am missing that you see so clearly.
Can you at least please help me save time by giving me a hint as to the nature of what I should be seeing? Something that should trigger hysterical laughing? Or trigger rage? This poor ignorant amateur videographer in Flyover Country humbly beseeches your indulgence.