Instagram’s messaging features let you video chat with up to six Instagram followers or Facebook friends on your iOS or Android device. Instagram also lets you create a Room, where you can share a Messenger video chat link with up to 50 friends who don’t need to be on Instagram, Messenger, or Facebook. Here’s how it works.
How to VIDEO CHAT on Instagram (New Video Calling Features)
Make sure you're using the latest version of the Instagram app on your iPhone or Android device.
Open Instagram on your mobile device and tap the Messenger icon at the top right.
Tap the video camera icon.