If you’ve spent some time on YouTube recently, you may have noticed that not every channel you land on looks the same. Some channels sport a new look that features a large header photo, social links, and a new design that reorganizes videos by category.

This new design is called the YouTube One Channel, and YouTube has had it in beta for some time now. In that time, over 100 million channels have opted-in to the new look. But for all of you holdouts, your days with the old channel format are numbered. YouTube has just announced that all channels with be automatically and permanently moved to the new One Channel design by June 5th.

“Channels that have already made the switch are experiencing several benefits. Their branding shines through in more places because Channel Art is visible on iOS apps, Android apps and TV. For the channels that have opted in, we’ve seen 20% more page views on their channels because clicks from the YouTube guide go directly to their channel pages instead of to their activity feeds,” says YouTube

Here’s what the new channels look like:

Compare that to the old channels, which will no longer exist come June 5th:

Of course, if you’re a channel owner and you’re just now hearing about this – you can choose to opt-in early here.

And speaking of YouTube and channels, the company just expanded live streaming to any and all channels with 1000+ subscribers.