I don't know for Jisti Meet integration in Jot messenger, but I have been using it since Covid hit, either standalone on their website or embedded in Matrix chats. It's unreliable, the connection will stutter sometimes for no apparent reason (sound lost, image blocked) and last I used it with more than 10 participants (2 years ago), the last ones would be excluded from the room.

It's a good alternative to Skype, if you use it as an alternative. That is, if you have a Skype account ready to fallback on.