YouTube's mobile version has launched new features, which includes best-quality video playback in the browser by making use of HTML5.

According to sources, the whole mobile YouTube site has been optimized for the small screen, and the experience on the phone is now much tighter.

Not only is the video quality improved, the web-app's interface is much better too, with big, touch screen-friendly button icons.

The library is simpler to navigate, the search box gives results as user type, videos can be book-marked like web pages, and favorites and the new "like"-style ratings have been added.

The mobile site defaults to H. 264 playback, considering that H. 264 is more widely supported than the new WebM on cellular phones, and given Apple's loyalty to H. 264.

YouTube can add whatever traits it wants rapidly, since it just has to update an internet site in place a native app, which needs a download. (With Inputs from Agencies)