Persistent Video Viewer is a Chrome extension developed by kufroj. It falls under the category of Browsers and specifically, Add-ons & Tools. This free extension allows users to continue watching YouTube videos even when they navigate away from the player page. With its small and draggable persistent viewer, users can enjoy their favorite content while browsing YouTube seamlessly.

The main feature of Persistent Video Viewer is its ability to keep the video playing in a separate window while users navigate to other tabs or websites. This means that users no longer have to keep the YouTube tab open just to watch a video. The viewer can be easily moved around the screen and resized to fit the user's preferences, providing a customizable viewing experience.

Overall, Persistent Video Viewer is a handy extension for YouTube enthusiasts who want to multitask or continue watching videos while browsing. Its simple and intuitive interface makes it easy to use, and the ability to keep videos playing in a separate window adds convenience to the YouTube viewing experience.