You already know about the Full Screen mode in YouTube video player that scales the current video to fill the entire desktop screen.

The one big problem with full screen mode in YouTube player is that you cannot do anything else on the computer while the video is playing - you have the exit the FullScreen before initiating any other task.

There's however an excellent alternative to Full Screen mode and that's about auto resizing the video player to fit the browser window. When you resize the browser window, the dimensions of YouTube Video player will change accordingly.

Here's how you fit the YouTube video in the browser window:

Say a YouTube Video URL is

To watch this clip in a resizable browser window without switching to Full Screen, just rewrite the above URL a

In other words, just append the YouTube video ID to this URL and stretch your browser window. You can then easily switch to other tabs, open new applications or do anything else while the YouTube clip is still playing in the maximum possible screen area.