Well Today's digital age, Video calling is most important to stay connected with our long distance close friends and family. You can easily do a video calling through facebook, Skype, facetime and Google hangout.
Gmail: In the bottom-left corner, click on the Hangouts icon .
Google+: In the top-right corner, click on the Hangouts icon .
Select a person from the Hangouts list. Or click the search button and type a name or email address. When you find the person you want, click their name.
If you want to start a group video call, check the boxes in front of multiple people's names.