Glossary
What is a cold open?
By the KeyMo team · Updated
A cold open starts a video on its most gripping moment before any title, intro or setup. The term comes from TV and film, where a scene plays before the opening credits. In clipping it means starting a clip on the best line, then adding only as much context as the viewer needs.
Cold open in film, TV and clips
In a TV episode, the cold open is the scene that plays before the title sequence. The idea carries to any format: start on content, not on a logo or a greeting. For a podcast clip, that means the first words a viewer hears are the most interesting sentence, not the host saying who the guest is.
Example: one answer, two starts
This is an invented example. A guest says at 41:12, "We almost shut the whole company down in March." The host's long question runs from 40:20 to 41:10.
| Version | Starts at | First thing the viewer hears | Risk |
|---|---|---|---|
| Setup first | 40:20 | The host's 50-second question | Most viewers have swiped before the answer |
| Cold open | 41:12 | "We almost shut the whole company down in March." | Missing context; fix with a caption or a one-line label |
The cold-open version gives the viewer the claim first. The cost is a little missing background, which a caption can cover in one line.
Why starting late helps
YouTube's retention guidance says audience size typically falls over a video, and it advises introducing compelling content earlier when top moments fall late. Its Intro metric is the share of viewers still watching after 30 seconds. That guidance is for long videos, but the logic scales down: on a clip, the first sentence is the intro.
- Skip greetings, throat-clearing and the host's recap.
- Start on a full sentence, not on a filler word or half a thought.
- Keep the claim and its payoff close together.
When not to cold open
- The line makes no sense without its setup: start with the setup, but trim it hard.
- The payoff is the surprise, such as a punchline: opening on it spoils it.
- The speaker needs a moment to introduce a name or a term the clip relies on.
- The best line comes at the very end: consider ending the clip there, not opening on it.
Common mistakes
- Starting mid-word, so the first sound is clipped off.
- Opening on "so" or "um", which wastes the strongest second.
- Putting a logo or title card before the line, which is the opposite of a cold open.
- Previewing the line and then replaying it. That is a teaser, and it makes a short clip longer.
Where KeyMo fits
Every KeyMo clip comes with a score out of 10 and a one-line reason, which helps you see why a moment was picked. Clip lengths are Auto (15 to 90 seconds), Short (20 to 40), Medium (40 to 60) or Long (60 to 90). To change where a clip opens, open it in the chat editor and describe the change you want. Captions in one of 12 styles let the first line land with the sound off. A cold open is one way to build a hook. For related ideas see pattern interrupt and soundbite.
Sources: Measure key moments for audience retention, YouTube Help (checked 11 October 2026).