---
title: "A/B Testing"
canonical: "https://blitzreels.com/glossary/a-b-testing"
---

# A/B Testing

URL: https://blitzreels.com/glossary/a-b-testing
Markdown URL: https://blitzreels.com/glossary/a-b-testing.md
Category: Social Media Video

## Definition

A/B testing for video means showing different versions of a title, thumbnail or hook to compare which one performs better.

## Extended Definition

YouTube has a built-in test for long videos. You can compare up to 3 titles, thumbnails or combinations in YouTube Studio on a computer. At the end, YouTube shows every viewer the version with the highest watch time, and the test should finish within two weeks.

The tool does not cover Shorts. For hooks, lengths and captions on short-form apps, post versions that change one thing and compare retention. Two posts give only a rough signal, because timing and audience vary. Results get more reliable as you repeat a test.

## FAQ

### Can you A/B test thumbnails and titles on YouTube?

Yes. YouTube Studio lets you test up to 3 titles, thumbnails or combinations on a computer. YouTube picks the version with the highest watch time, and the test should finish within two weeks.

### Can you A/B test YouTube Shorts?

Not with YouTube's built-in tool, which excludes Shorts, scheduled live streams and Premieres until they convert to long-form videos. For Shorts, compare posts that change one thing, and treat the result as a rough signal.

### What should you A/B test first in a video?

Start with what decides the click or the first few seconds: the thumbnail, the title or the hook. Change one thing at a time so you know what caused the difference.

## Next Step

[Pull thumbnail options from your video](https://blitzreels.com/tools/video-frame-extractor): Grab frames to test as thumbnails with the free frame extractor.

## Related Terms

- thumbnail
- hook
- watch-time
- video-analytics

## Search Terms

- video A/B testing
- video AB testing
- A/B testing video
- thumbnail A/B test
- YouTube title test