Vertical is a different film, not a crop

There is a toggle at the start of a shoot with two options on it, 9:16 and 16:9, and it is the control people think about least. It looks like the sort of thing you would find in an export dialog, next to the file format. Most sellers pick whichever one matches the last place they posted something, and move on to the parts that feel creative.

That reading is wrong in a specific and expensive way. The ratio is not applied to the film at the end. It is one of the inputs the film is built from, alongside the product photo — the shoot is composed for the shape from the first frame, which means the shape has already decided things about the picture before there is a picture.

A crop and a composition are different operations

Take a wide frame of a bottle standing a third of the way in from the left, with the rest of the frame given over to a lit surface falling away behind it. Now make it vertical. If you crop, you keep a tall slice of the middle: the bottle is off the edge or jammed against it, most of that lit surface is gone, and the negative space the shot was balanced around no longer exists. What you have is not a vertical version of the shot. It is a piece of the shot.

Composing for vertical instead means starting again from the shape. The bottle moves to the centre because a tall frame has one comfortable place for a single subject. The surface behind it gets shallower and taller. The camera, which had room to travel sideways, now has room to travel up and down instead. Every one of those is a decision that the wide frame did not need to make and could not have made for you.

This is why the two ratios produce two films rather than one film in two sizes, and it is worth saying plainly because the alternative belief — that you can shoot once and reshape later — is what leads to the frame with the product half out of it.

The two shapes, and what each one asks for

Video renders in one of two shapes here, and the pair is deliberate rather than a menu that got short. Square is not offered for video at all, because the underlying render is native to these two and a square film would be a crop of one of them — the exact operation this post is about.

• 9:16, the tall one. One subject, centred, close. There is very little horizontal room, so a second object in frame competes rather than supports. The camera's natural move is vertical — rising up a surface, descending onto it — or a slow push straight in. Backgrounds matter less than in wide, because there is less of one, and what there is sits mostly above and below the product where it reads as tone rather than as place.
• 16:9, the wide one. Room to the sides, which means room for context: the product can sit off-centre and be balanced by something — a surface, a shadow, a fall of light, a second item. The natural move is lateral, a drift or an orbit, and it has distance to cover. Wide is more forgiving of a product that is small in frame and much less forgiving of a background that has nothing in it, because you can see all of it.

Notice that these pull in opposite directions on the same question. Vertical wants you to remove things and get closer. Wide wants you to give the product somewhere to be. A shot conceived for one and delivered in the other is not merely cropped badly — it is answering a question nobody asked.

The site's own two films are the worked example

This site's landing page shows a vertical film and a wide film side by side, and they are two different products. That is not an oversight and it is not laziness in sourcing footage. The two masters come from different shoots, because showing the same product in both shapes would have required generating it twice — which is the whole argument, sitting in the page furniture where nobody notices it.

Real Nitaris output · 0:10

The pendant is vertical. It is centred, it fills a lot of the frame, and the move works up and down the chain and the stone. There is almost no background doing any work, and the film does not need one — the shape has already removed the room where a background would have had to be interesting.

Real Nitaris output · 0:08

The popcorn is wide, and it is doing the opposite job. The product is not centred and not filling the frame; it is placed, with space either side that has to be worth looking at, and the camera moves across rather than along. Crop that to vertical and you lose the placement, which is most of what the shot was.

Neither is a better film. They are correct answers to two different questions, and each would be a poor answer to the other one.

So decide it first, and decide it from where it will run

The practical rule is short. Before the shoot, not after: where is this going to be seen, and what shape is that surface? Choose the ratio from the answer, then let the framing follow from the ratio.

The awkward part is that the honest answer is often "both", and both means two shoots. A product page and a vertical feed are different shapes and there is no ratio that serves them equally — 1:1 is sometimes proposed as the compromise, and for stills it is a real one, which is why the photo sets offer it. For video it mostly means being slightly wrong in two places at once.

• If you have to pick one, pick the shape of the surface you actually get traffic from, not the one you wish you did.
• If you are generating both, treat them as two shoots with a shared treatment rather than one shoot exported twice. Same product, same light, same mood; different framing and a different move, because the shapes ask for different ones.
• Check the ratio before you check anything else about a take. A well-lit film in the wrong shape is not a film you can rescue in the edit, and reviewing it for finish first wastes the attention you should have spent on the thing you cannot fix.

Go and look at your own surfaces

One thing this post will not do is tell you how any particular storefront or feed treats a video you upload — which shape it prefers, what it does to one it did not expect, or where it puts the edges. Those behaviours belong to other people's products, they change without announcing it, and being confidently wrong about them here would be worse than saying nothing.

So go and look. Open the place your product video is going to appear, on a phone, and see what shape the player actually is and how much of it a listing gets. It takes a minute, the answer is authoritative because you observed it, and it is the input this decision needs. Anyone who tells you the answer without looking is guessing, including us.

The test

Before you generate, describe the shot out loud in one sentence: where the product sits, what is around it, and how the camera moves.

Then ask whether that sentence would survive being told about the other shape. If it would — if the product is dead centre, close, with nothing beside it that matters — you are describing a vertical film and you should choose vertical. If moving it to a tall frame would delete something you named, you are describing a wide one. If you cannot answer because you had not decided where the product sits yet, that is the real finding, and the ratio toggle was never the thing you were stuck on.