https://www.youtube.com/watch?v=rDNYhvAtrWA

The Long awaited official Telegram Video Calling is out and I must say, I was impressed even though it's called (beta) it performed seamlessly as a stable release.
- End to End Encryption on Video calls.
This is the part they haven't done well on before now but it seems the team have listened to the people clamor for Encryption.

- Picture in Picture mode.
This is another sweet feature not available yet in WhatsApp video call or zoom. You can use any other app while on your video call (requires permission to draw over other apps - Android)

- Poor Network connection Friendly.
Tested the video call with GLO NG network during its worst state and Telegram Video managed to pull through with out reconnecting.

For Android Users, you'll have to update your Telegram app to version 7+ to get the Video calling feature.
You should check it out