The Window Expander for YouTube maximizes YouTube videos in your Google Chrome web browser eliminating all white space and other texts. This is different then the full-screen button in that it does not change the size of the actual browser window, it just fills the window with video.
Window Expander for YouTube
This small little extensions expands the YouTube video you are watching. The difference is that the YouTube expander plays it in full screen where as this extensions views it such that your browser’s tabs are visible.
It has also got an options page where you can change settings, i.e. set your preferences as to the resolution of the video.
You can now set a preferred quality level for YouTube Videos. The options include small, medium, large, 720p, and 1080p.
For installing this extension on your Google Chrome browser, head over to its Install Page.