The max-video-preview robots directive sets the maximum duration, in seconds, of an animated video preview that Google may display for a page in search results. Like max-snippet and max-image-preview, it is delivered via the meta robots tag or X-Robots-Tag HTTP header. Accepted values are a non-negative integer specifying the maximum preview duration in seconds, -1 to grant Google unlimited preview length, or 0 to block video previews entirely. For example, max-video-preview:5 would allow up to a five-second loop. The directive was introduced by Google in September 2019 as part of a suite of preview control tools aimed at publishers seeking to limit automated use of their content in search snippets, particularly in the context of European copyright legislation. It has no effect on whether the page ranks or is indexed; it only governs the presentation of video content in search result previews.