HTML5 Video Controller is a Chrome extension developed by Trismegistus Tech. This free extension falls under the category of Browsers, specifically Add-ons & Tools. The program's main purpose is to provide a simple and convenient way to control HTML5 videos using keyboard numbers.

With HTML5 Video Controller, users can easily navigate through HTML5 video playback by simply pressing numeric keys on their keyboard. This extension eliminates the need to manually click on the video player controls, making the video watching experience more efficient and seamless.

The extension is designed to work specifically with HTML5 video players, allowing users to play, pause, rewind, fast forward, and adjust the volume using the numeric keys. This feature is especially useful for those who frequently watch videos online and prefer using keyboard shortcuts for control.

Overall, HTML5 Video Controller is a straightforward and practical extension that enhances the user experience when watching HTML5 videos. Its simplicity and ease of use make it a valuable tool for anyone who wants to have more control over their video playback.