Before March 7th, not everyone could use YouTube's new interface because it was still under development. During that time and up until now, YouTube sent an email to a select few lucky users inviting them to try the new design by clicking a link. There will be no problem upgrading it because the new style is accessible to everyone who uses YouTube. Follow the instructions to apply the new look to your channel. 1) Use a computer or smartphone to log into your account. 2) Select the "test new design" link in the top-right corner of your channel page. 3) After doing so, a detailed tutorial for utilizing the new layout will be displayed. The new update will be implemented.