Youtube Popup Comments is a free Chrome extension developed by Armaan Shah. This handy add-on allows you to view YouTube comments without having to scroll away from the video you're watching.

By clicking on the button added to the top of the YouTube user interface, right next to the watch later button, a pop-up window will appear on top of your video. This window displays the comments, allowing you to scroll through them while still keeping the video in view. It's a convenient way to stay engaged with the comments section without losing track of the video content.

Closing the pop-up window is as easy as clicking the button again, allowing you to focus solely on the video. Overall, Youtube Popup Comments is a useful tool for YouTube users who want to keep up with the comments without interrupting their video-watching experience.