Not Interested! is a free Chrome extension developed by Make Stuff Studio. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. This handy extension allows users to quickly mark YouTube videos and playlists as "not interested" with just a single click.

With Not Interested!, users can simply hover over a video's details and press the hotkey (default: ALT+Q) to mark the video as not interested. This feature provides a convenient way to filter out unwanted content and personalize your YouTube experience.

It's worth noting that the extension currently only works in English. However, following a recent YouTube update, homepage videos will highlight the area where you need to hover to mark the video as "Not Interested!" This makes it even easier to use the extension effectively.

As of version 2.2, Not Interested! also allows users to remove videos from a playlist using the same hotkey. This new feature simplifies the process of managing your watch later playlist.

Overall, Not Interested! is a useful tool for YouTube users who want to quickly mark videos and playlists as not interested, providing a more tailored browsing experience.