A standalone clip answers a question it raises and never says 'as I mentioned earlier.' If a stranger cannot follow it cold, it is not ready to post.
A single viral clip is a lottery ticket. A repeatable series is a business, and it only works if the container survives the boring episodes.
Repurposing is a search problem, not a cutting problem. A three-hour interview holds a handful of real moments, and the rest is filler that should never ship.
A Short is not a trimmed landscape video. The framing and pacing change once the screen goes vertical, and so does where you put the payoff.
