Greasy Fork

v5.2, 2025-08-06: Add localStorage of fetched an_webp urls for a few hours so a page refresh or a new tab has some immediate cached data available for faster performance. Handle some problematic videoID formats to get more an_webp urls successfully. Add new exclusion for 'Upcoming' video tiles.

v5.1, 2025-08-06: Better selectors to better select only new UI video tiles and exclude text posts etc.

v5.0, 2025-08-05: New method to restore an_webp GIF-style on new YT UI pages. Attempts to fetch an_webp thumbs for homepage/ subscription page via YT search endpoint (anonymous fetch so won't affect user's search history) and takes a few seconds for first batch to load. Carousel fallback remains functional for when an_webp thumbs not available or not yet loaded.

v4.3, 2025-08-03: Better variable names and improved code comments.

v4.2 Add new exception to carousel fallback to prevent unnecessary image request.

v4.1, 2025-08-02: Youtube now sometimes includes videos with inline videos disabled (marked by a play icon crossed out on the thumbnail overlay), these prevent the carousel fallback fix enabling, so v4.1 adds a fix to handle this correctly. Also adjust the fallback carousel pace to 500ms/image so it is faster.

v4.0, 2025-07-28: Add new carousel fallback for Youtube's new homepage UI.

v3.0, 2025-07-12: Add fix for new youtube update to sidebar vids; remove carousel fallback.

Add a fallback option for users affected by YouTube's recent code changes that they are no longer providing an_webp animated thumbnail URLs on the homepage. The fall back makes a still image carousel/slideshow of some available screenshots apply to the homepage. At time of writing only some users affected and only the homepage is affected, other pages continue to work with an_webp animated thumbnails.

Update documentation to advise not Greasemonkey compatible.