If one carefully read Telegram’s blog post of June 25 of this year(2021), we see that the article explains “voice calls in any group can now be intuitively changed to group video calls.” Except that the process is not that intuitive. First you need to create a group, then a group voice chat and finally a group video call. No worries, we’ll just see how to do it somewhere online.
Create a Telegram group (top left menu via Home> New group) or go to an existing group of which you are an administrator
Tap the group banner to view details and tap the menu at the top right
Select Create voice chat
Once the group voice chat is created, press the Camera button at the bottom left of the screen.
In terms of features, we find the same range as on any other video calling application. You can tap a participant’s window to bring them in front or just pin them to stay onscreen when new participants join the call.
Group voice chats on Telegram have no limit on participants, but video calls are currently limited to 30 parties. Telegram has also implemented a screen sharing feature as well as another to reduce surrounding noise.