4. Wait for few minutes, you will soon see ” You’re beta tester of this app. Awesome ! “
5. Now Update your Whatsapp from Playstore
6. That’s it, now you can video call any one, make sure they also sign up as beta tester and have same version of app as you have.
If you are going to get the WhatsApp beta version, remember that it is not yet available on iOS devices. But, the video calling ability of WhatsApp should be released any time soon.