title: Making a Video call using Hangout api
body: <p>Hello i have an android application , in which i want a video chat functionality ,
  i searched a lot on internet but couldnot find any working and simple solution to this , then i found hangout api , </p>
  
  <p>now i want to add hangout video call feature to my own application but i cannot find where to get started .</p>
  
  <p>All i want is from my own android application i want to initiate any third party application for video call . and get back to my own application when video call is done</p>
  
  <p>how can i acheive this ?</p>
  
  <p>i have my application codes , but sharing them here will make it complex , any guide to get started , i shall be thankfull</p>