The new desktop experience is said to highlight your favorite videos and creators while making the site easier and more fun to use.
The key principles of this new design are:
● Simplicity: The only thing you should be concerned about is watching the content you love. The new design is clean and fresh, thanks to the removal of visuals that can distract from your browsing or watching experience. We're focused on making the content shine!
● Consistency: The new design is aligned across Google platforms, including the YouTube mobile app, while still providing the features you know and love.
● Beauty: We strive to combine beauty and purpose to create an effortless experience.
The site is build on a new, faster framework called Polymer. The framework should enable quicker feature development in the future. One of the first features to be unveiled is a new Dark Theme.
Developed to cut down on glare and let you take in the true colors of the videos you watch, Dark Theme turns your background dark throughout your entire YouTube experience.
To try out the new design visit youtube.com/new. You can return 'Restore classic YouTube' from the Account Menu. You can also toggle on Dark Theme from the Account Menu.