What a media buyer needs from your creative
When the person running your ads asks for more files, they are asking for one of the few levers they control: options that can be compared.
You are paying somebody to run your ads. They asked for creative, you sent them the video you were proud of, and a week later they came back asking for four more versions, a different shape, and a copy with nothing written on it.
It feels like the video was rejected. It was not. A media buyer has a small number of levers and most of them are attached to the creative, so a single file is a single lever, and a single lever cannot be tested against anything.
What follows is the list of what to send and, more usefully, why each item exists from the other side of the handover. Once you understand the why, you can brief it rather than being asked for it piece by piece.
Why does the buyer keep asking for more files?
Because the account learns which creative wins by comparison, and one asset gives it nothing to compare against. A single ad still teaches you about audience, placement and whether it converts at all; what it cannot tell you is whether a different hook or angle would have done better, because there is nothing beside it.
When an ad underperforms with a single creative in it, nobody can say whether the problem was the opening, the shape, the offer, the audience or the day. Every explanation is available and none can be ruled out. With several versions that differ in known ways, the account starts producing answers rather than opinions, and those answers are the thing you are actually paying for.
There is a second reason, which is that creative wears out. The same file in front of the same people stops working after a while, and the buyer needs somewhere to go when it does. A buyer with one asset can only turn it off.
One video is not one asset
Placements are shaped differently, and though the platform will stretch, crop or letterbox one file to fit them all, a composition built for the wrong rectangle arrives compromised. Purpose-built shapes are worth the extra exports.
A vertical full-screen placement wants the frame filled top to bottom, with the important content kept clear of the strips at the top and bottom where the interface sits. A feed placement is usually square or close to it, and it competes with things around it rather than owning the whole screen. Anything horizontal is a different composition again.
Cropping a horizontal video to vertical after the fact is a compromise you can see, because the framing was decided for a different rectangle. If the shoot knows in advance which shapes are needed, the subject can be placed so that all of them work, which costs nothing on the day and is impossible afterwards.
Send at least two shapes. Ask which two before anything is filmed.
Why must the variants differ in one thing?
Because a variant that differs in five things is not a variant, it is a second campaign.
The buyer will run versions against each other and read what happens. If version A has a different opening, a different length, a different soundtrack and a different closing frame from version B, then whatever the numbers say, nobody can attribute it. The test cost the same as a good one and taught nothing.
So the useful set is several openings on the same body of a video. One asks a question. One shows the result first. One says the objection out loud. Same footage after the first few seconds, same length, same everything else. That set produces a readable answer about openings, and openings are the most useful thing to have a readable answer about.
Film the alternatives while the camera is still set up. Afterwards they cost a shoot day. Before you break down, they cost minutes.
Why should the offer stay out of the picture?
Because an offer burned into the video has an expiry date, and burning it in gives the whole asset the same expiry date.
A price, a deadline, a seasonal reference: any of these written into the frame means the file dies with the promotion. It also cannot run in a market where the offer differs, and it cannot be reused next year.
Offers belong in the text around the ad, where the person running the account can edit them in seconds without anybody opening an editing timeline. Keep the video about the thing itself.
The same applies to anything that dates: a member of staff who might leave, a packaging design about to change, an award with a year attached.
What is a text-free master for?
It is the version with no captions, no titles and no graphics baked into the picture, and it is the file that lets everything else happen later.
Captions can be added to it in any language. On-screen text can be rewritten when the message changes. A shorter cut-down can be made without a subtitle running off the end of a shot. And where a platform's own caption tool is preferred, it can be used without fighting text that is already in the picture.
Ask for it as a delivery item alongside the finished versions. It costs an export and it is the difference between an asset that can be adapted and one that is finished in the most literal sense.
What does the buyer need in writing?
One short note per variant, saying what it is testing and what it assumes about the viewer.
"Version 1: opens on the problem, aimed at people who do not yet know this is fixable. Version 2: opens on the result, aimed at people already comparing suppliers." Two lines each. That note lets the buyer point each version at the right place rather than guessing, and it means the results come back as knowledge about your customers rather than as a ranking of files.
Without it, every variant is treated as interchangeable, and interchangeable variants produce a winner with no explanation attached. A winner you cannot explain cannot be repeated, which is the worst outcome of a test that technically worked.
The next time creative is commissioned, agree the shapes, the number of openings and the text-free master before anybody films anything, because every one of those is free to decide in advance and expensive to add afterwards.
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