Different platforms need genuinely different edits, not one video resized
A video built for YouTube’s longer-form attention span rarely performs well simply resized for a short-form feed. Pacing, hook timing, and even aspect ratio need to be planned per platform from the start, not adjusted after the fact.
The first three seconds decide whether the rest gets watched
On most social and short-form platforms, the overwhelming majority of drop-off happens almost immediately. Getting the opening hook right matters more than production polish for the remaining runtime.
Paid video needs its own creative testing process, same as static ads
Video ad performance varies as much between creative variations as static image ads do, which means a single polished video without variations to test against leaves real performance on the table.