Google brings YouTube party mode to Google+ Hangouts, and it gives you the opportunity to do your homemade party concerts! as long as everyone has the web app running, they can share individual videos or whole playlists that run in sync. Any set of videos is shareable through Google+ or YouTube proper. Voice chat, mercifully, flips to a push-to-talk requirement to prevent friends from talking over your favorite clip.
To know more head up to our source down below.
Source : Official YouTube Blog