The fun of group chat and it is also on video is possible only due to Google + hangout.To start hangout you have to login in to your Google+ account or you have to sing up for Google plus account .
what is Google Hangouts/Google+ Hangouts?
Google+ Hangouts is a free video chat service from Google that enables both groups chats and one-on-one chats. In group chat we can do video chat up to 9 people.While it is somewhat similar to Facebook video chat, Skype butGoogle Hangouts focuses more on “face-to-face-to-face” group interaction as opposed to one-on-one video chats,it also focus on the person which is currently on chatting.
Now Hangout with Gmail:
Now the Google enables the hangout service into gmail also.To start hangouts on gmail you want to click on camera icon which are near to the G talk panel.Then after one new window pop-up appears on your computer/laptop screen,where you can see your Google + friends list,here you can add your friends into video chat list by clicking on their gmail ids.
By using your gmail id you can send hangout request or invitation to your friend who is not on Google +.By using hangout and youtube you can broadcast your video chat,for broadcasting you need a youtube account.Due to youtube broadcasting your video chat conversion and photos are visible to all.once hangout start you can see your group members list on below portion of your compute screen and video at the up side of screen.
You can see chats,screen share,Google drive,Google docs,effects and ping pong hangouts options on the left hand side of gmail window.By using chat and hangout option you can send message to your friends.And by using screen shot option you can share screen shot with your friends.once you share screen shot your group members can see the your video.Also Google drive and Google docs can add more fun into hangouts.
Some others fun with Hangout:
If you want some other fun with Google hangout then you can play games in hangout.Google provide different games to play ,you can play game with any member of your hangout group.Also in hangouts you can use different wallpapers,sound effects,photos etc also you can use different apps by your choice.
Nowadays Google try to hangout their all services like calender,emails so at once time you can share thing to your different friends. Watch the video:“Google+: Fun with Hangouts”
Note:Google Hangouts can be accessed via laptop and desktop computers as well as with Android mobile devices (Android “Gingerbread” v2.3 and later) and, in the near future, iOS-powered mobile devices.also it support all latest web browser.
Here You can download hangoutplugin: https://tools.google.com/dlpage/hangoutplugin