YouTube Video Deck helps power viewers keep up with their subscriptions in a multi-column layout that's straight out of TweetDeck's playbook. The app ties in to your existing subscriptions, so you'll need to follow content creators on YouTube first to be able to use the app.
From there, you can set up multiple columns that are sorted however you choose. For example, you can keep comedy videos in one column and news videos in another.
Obviously, YouTube doesn't have quite the same speed that Twitter does that makes something like this useful for the average user, but if you keep track of a lot of channels, this may just be the best way to keep an eye out for new content.