Short-Form Video

A short-form video is a very short video, usually between ten seconds and three minutes long. It is almost always filmed vertically, meaning in the format of a phone held upright. You see such videos on TikTok, on Instagram under the name Reels, and on YouTube as Shorts. What’s typical is that you don’t search for them deliberately, but instead get them served automatically one after another. A swipe upward, and the next video is already playing. The opposite term is long-form video, which refers to anything longer, from a twenty-minute explainer video to a series episode.

Why the format has reshaped the attention economy

Advertising on the internet is paid for based on attention. The longer someone stays in an app, the more ads can be shown to them. Short videos hold people’s attention remarkably well because a new video comes immediately after each one. There is no natural endpoint at which one would stop. This is exactly what makes the format so valuable for platform operators.

As TikTok grew internationally starting in 2018, Facebook measurably lost usage time among younger people. Meta responded with Reels, Google with YouTube Shorts. Both companies overhauled their apps within a few years so that short videos would appear prominently. For investors, this is a recurring topic in quarterly results: companies report what share of their revenue they already earn from short videos.

Economically, this overhaul is not without risk. An ad placed alongside a long video often brings in more money than one placed between two fifteen-second clips. Platforms refer to this as the monetization gap, meaning the difference between usage time and actual revenue. Closing this gap was for years one of the central goals at Meta and YouTube.

The recommendation algorithm as the real engine

What’s technically decisive is not the camera, but the software that decides what you see next. This program is called a recommendation system, or colloquially, an algorithm. It continuously measures your behavior: How long do you watch? Do you swipe away immediately? Do you watch the video a second time? From such signals, an AI model estimates how much you would like a video you haven’t seen yet.

Short videos provide much more feedback than long ones. In half an hour, you might see sixty clips instead of two films. The system thus gets sixty data points instead of two and correspondingly learns faster what interests you. You can think of it like a waiter who brings you tiny samples and watches your face after every bite. After thirty samples, he knows your taste better than after one whole main course.

A common misconception is that reach depends primarily on the number of subscribers. With short videos, what counts instead is how well a clip performs with a small initial test group. If it does well there, it gets shown further; if not, it doesn’t. That’s why completely unknown accounts can suddenly get millions of views.

Short videos in school, news, and politics

In everyday life, most people encounter this format several times a day, often without a conscious decision. News outlets, museums, and universities are now also producing short videos because they reach younger people that way. The downside: complex topics have to be condensed into just a few seconds. Context is often lost in the process, and misinformation spreads quickly.

In business news, the term mostly comes up in connection with platform regulation. The US and several governments have discussed bans or forced sales of TikTok, partly because of concerns over access to user data. The EU’s Digital Services Act also obliges large platforms to assess the risks of their recommendation systems. Anyone following Meta or Alphabet stock regularly comes across metrics related to short videos.

A new question that has emerged is how many of these videos are even still made by humans. AI tools now generate short clips from a text description, cropped to fit vertical format. For platforms, this is cheap supply; for viewers, it makes a video’s origin harder to recognize.