How to write hooks, titles and thumbnails for explainer videos

Promise one specific thing and deliver it fast. The title and thumbnail should make the same single promise, the first ten seconds should show you are about to deliver it, and your retention graph tells you where viewers stopped believing you. Change one element at a time so you can tell what helped.

Credit prices are from kadapt.com/creator as of 2 November 2026 and can change. This is practical guidance, not a promise of views or income; your audience and YouTube's rules decide that.

A viewer decides in seconds whether your video is for them. Title, thumbnail and opening all have one job: make a single promise and prove you will keep it.

Start from the promise

Write one sentence: “After this video, you will know ___.” If it needs an “and”, it is two videos. Every part of the packaging should repeat that sentence in its own form.

Titles

• Use the words your viewer would type, not your internal name for the idea.
• Put the concrete subject early.
• Promise only what the video delivers. A title that overreaches costs trust and watch time.
• Draft five versions and keep the plainest that is still specific.

Thumbnails

• One idea, a few words at most, large enough to read on a phone.
• Show the thing, a before and after, or a number, not a collage.
• Do not repeat the title word for word; add the angle.

The first ten seconds

State the problem in the viewer’s terms, say what they will get, then start. Skip long branding and “before we begin”. The script guide covers hooks and pacing in detail, and the free script checker helps you see how many words you spend before the point.

Read your retention

If your channel shows an audience-retention graph, look for the first big drop, then for steady slopes and sudden cliffs. A drop in the first 30 seconds is usually about the promise and the opening; a drop mid-video is usually about structure or length. Change one element at a time and compare against the previous video.

Keep the promise honest

Hooks that mislead may win a click and lose the viewer. Fact-check what you promise with these steps, then make the video with Kadapt Creator; see pricing for credits.

Common questions