How to Use Kast? (formerly Rabb.it)

Have you heard about Kast (formerly known as rabb.it)?

Kast a video streaming service which lets user stream on its platform to
share what he is viewing on different sites like Netflix, Amazon Prime, Hulu, etc with other people. It also lets the user chat in that room.

Want to use it with someone? Here is a step by step guide with pictures to help you

how to use kast ?