That means if you want to participate in making the latest viral video even more infectious, you can do it by combining the power of Google+'s Hangout and YouTube's video-sharing functions.

Since the beginning of Google+, early adopters of the new social network have been raving about its Hangout feature, some even calling it G+'s "." Hangouts have been so well appreciated that soon after Google+ went live, Facebook made a counter move and announced its Skype-powered in-browser service.

For Google+ users, taking advantage of the new YouTube feature is simple.

While watching a YouTube video hit "Share" under the video pane, then "Watch with your friends: Start a Google+ Hangout." From there, you'll be asked to install the Google Voice and Video Plugin if you don't already have it. Then it's just a matter of choosing the Circles you'd like to include in your video-watching party.

If you haven't been invited to Google+ yet, you'll have to wait to use the new YouTube function. Google's social network is still in "field trial" and its floodgates haven't yet been opened to the masses.