Most online shops add a video the same way they add a banner: somewhere on the home page, because that is where the space is. The video then gets a few views, no one measures it, and the team decides video "doesn't work". The problem is usually placement and content, not the medium. Here is how I decide both when a store asks me to animate something.
Put it where the doubt is
A shopper does not need a video everywhere. They need it at the exact point where they hesitate. In a store that is usually one of three places.
The product page of a product that is hard to judge from photos. Anything with a mechanism, a size relationship or a setup step: a 20-second clip showing it in use answers questions the photo gallery cannot. This is the highest-value spot, and it is the one most stores skip.
The cart or checkout step, for a policy that causes drop-off. If shoppers abandon because they are unsure about returns, delivery windows or subscription cancellation, a short plain explanation beside that step does more than a longer FAQ page.
The first ad touch. For paid social, the video is the ad. Here the rules are different: the first two seconds must carry the point, and it must work with the sound off.
The home page hero is the last place I would start. Visitors there have not decided what they care about yet, so the video has nothing specific to answer.
What to show, in order
Whatever the placement, the structure that holds up is short:
- The situation the shopper recognises. One concrete sentence or scene, not a brand intro. "You measured twice and it still did not fit" beats a logo animation.
- The product doing the thing. Show the product in use as early as the first third of the video.
- One proof point. A real number, a real detail, a real customer line. Not three claims, one.
- The next step, spoken plainly. Where to click, what happens after.
Cut anything that does not serve one of those four. Most first drafts are twice as long as they need to be.
Length and format
For a product page, 15 to 30 seconds is plenty. For a policy or how-it-works clip, up to 45. For ads, render a 9:16 and a 1:1 from the same project so you do not rebuild it for each platform. Always add captions, since a large share of shoppers watch muted.
Measure one thing
Pick the single number the video is supposed to move before it ships: add-to-cart rate on that product, checkout completion, or click-through on the ad. Compare the pages with and without it for a couple of weeks. If it does not move that number, fix the placement or the opening seconds before blaming the format.
I wrote a longer version of this, with examples by product type, here: https://vaghelabhavesh.com/blog/ecommerce-explainer-video-guide.html
