YouTube Tests Rounded Channel Icons

YouTube experiments with a slightly different interface that uses rounded icons for channels and moves the title and buttons like "add to" and "share" to the right.

Here's an image that shows both the experimental interface and YouTube's regular UI:

YouTube's mobile apps already use rounded icons, just like Google+ and Google's navigation bar. "If your Channel is merged with a Google+ profile or page, then your YouTube Channel Icon and your Google+ Profile Image are synched," informs YouTube's help center.