Here is some interesting extension for your chrome browser... It will make your screen dark for better video display... cool extension.
Few great features in this chrome extension: ✓ Icon to appear in the URL bar ✓ Turn the lights back on, by clicking on it ✓ Support multiple video sites: YouTube, HTML5 video,... and more ✓ Support multiple image sites: Google Images Search, Picasa,... and more ✓ Easter Eggs: Shortcut key: T -> Do you like a real movie theater? ✓ Option to make the screen dark if the user click on the play button ✓ Option turn on/off fade in and fade out effect ✓ Custom colors ✓ Option Flash Detection ✓ Option Show Dimness Level Bar
Want to install this extension ? : Click Here