To restore animated thumbnail previews. Requires inline video previews to be disabled in your YouTube user settings (Go to https://www.youtube.com/account_playback and set "video previews" to disabled). Not Greasemonkey compatible. v4 Add new carousel fallback for Youtube's new homepage UI.
< Părere la script-ul Restore animated thumbnail previews - youtube.com
Seems it stop working for me too :(