expand-youtube is a free Chrome add-on developed by Christopher Kwai-Pun. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. The main purpose of this program is to enhance the YouTube experience by allowing users to expand videos directly from the subscriptions page.

With expand-youtube, users no longer need to navigate away from their subscriptions page to watch a video in full screen. This add-on adds an expanding tab to the YouTube subscriptions page, which includes an embedded player. This means that users can view their subscribed videos without the need to open a new tab or leave the page they are currently on.

The simplicity and convenience of expand-youtube make it a great tool for YouTube enthusiasts who want to streamline their video-watching experience. By eliminating the need to open multiple tabs or navigate away from the subscriptions page, users can save time and enjoy their favorite content seamlessly.