YouHide is a free Chrome add-on developed by Maxime Cousinou. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This handy tool is designed to hide viewed videos on Youtube's subscriptions page, providing a cleaner and more organized browsing experience.

With YouHide, you can automatically hide both fully viewed and partially viewed videos on your Youtube subscriptions page. This helps you keep track of the videos you haven't watched yet, allowing you to focus on the content that is new to you. The add-on offers the option to alternate between hidden, quasi-transparent, and original display for the hidden videos, giving you flexibility in how you want them to appear.

Overall, YouHide is a useful Chrome add-on for Youtube users who want to declutter their subscriptions page and easily identify unwatched videos. It provides a simple and effective solution for managing your video content on Youtube.