Thumbnail
The still image that stands for a video before anyone clicks it; with the title, it decides the click.
A thumbnail and title together are the video’s packaging. On long videos they drive CTR; on Shorts, people mostly see the video itself in the feed, so the first frame matters more.
A thumbnail that promises what the video does not show raises clicks and lowers retention, and misleading ones can break YouTube’s policies.
Generate titles and hashtags
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