One can easily view YouTube videos on full screen with just a click of a button. But the full-screen option offered by Youtube occupies the entire desktop screen which you might not want every time. Here is an easy way to set YouTube videos to play in full-screen mode by default and they will expand to the entire window of your browser only.
To Set YouTube video to play in full screen by default, just replace watch?v= with v/ in the video link. An example of the same is given below:
Original URL – http://www.youtube.com/watch?v=9Kyb7U_djUk
Modified URL – http://www.youtube.com/v/9Kyb7U_djUk
Then use the modified video URL or share it to view Youtube videos automatically within the entire area of your browser window. 😉