How to Custom Group Content Layout on Youtube and add channels
Please check out http://youtu.be/etMCVx-fpTo to enable custom grouping by editing your channel navigation from feed to Browse. This will enable your page to display Horizontal rows that our customization like I'm sure you have seen with most popular pages.
Part 2
This is how to custom group your youtube channels content layout on your page and add other channels. You can add your friends channels or group channels your a fan of. You can also customize your layout by creating playlist and adding them to you content on your page. This is a simple sort of how to do this. If I left anything out or you have anything to add please post a comment :) would love to hear some feedback of new ways of grouping and or adding content to my youtube page.
Thanks Xzulas