YouTube has started A/B testing a Home-feed feature called Discover videos with Previews for a small percentage of mobile users during the week of March 21 to March 28, 2026.
The test adds five to ten short, auto-play snippets to a video card. The idea is to let viewers sample different moments from a video before deciding whether to open it.
What the test shows
According to the source description, the preview card lets users do more than just watch the snippets. Viewers can also save the video to Watch Later or jump straight into the full video from the card.
The source says this format is different from YouTube's existing hover or inline previews because it groups multiple short moments into a discovery-style carousel instead of showing only a single preview.
What is confirmed so far
The source describes the feature as an experiment, not a full rollout. It says the test is limited to a small share of mobile users.
Early coverage cited in the source says the format could affect how creators approach openings, pacing, and thumbnails if YouTube expands the test. The source does not say that YouTube has announced a wider launch.