Hangouts-gmail-video call 2

From 9to5Google:

When Google rolled out its new unified Hangouts messaging service, some users were disappointed that the new experience within Gmail removed the ability to place free calls within the US and Canada. Google previously confirmed that the feature would be returning and today it announced on its Gmail blog that it is rolling out the free calling feature to Gmail Hangouts and also adding some new features.

More at 9to5Google.com