First seen in 2011, Utilities. This page records what the extension did, whether it is still available, and what to use instead.
What it was
Ultimate YouTube Downloader was a 2011 downloader that supported YouTube plus Vimeo, Dailymotion and other video sites, with format selection and MP3 extraction. It was distributed outside the Chrome Web Store, which prohibits such extensions.
No longer available
Extensions that download YouTube videos or audio are prohibited by the Chrome Web Store's developer policies, so this extension was never carried by the store and is not distributed here. Downloading YouTube content is also against YouTube's terms of service. The list below shows the video downloaders the store does permit; they work on sites other than YouTube.
Current alternatives
The extensions the Chrome Web Store ranks highest for "video downloader extension" today.
