Video explains 3 kinds of 'multiverse' models
A video lists three kinds of 'multiverses', proposed universe models which haven't been confirmed yet. As per the 'membrane' model, our universe is embedded within a larger super-universe. 'Bubble universe' model states that since other parts of the universe exists far away, we'll never see them. 'Many worlds' model, proposes that every possible alternate timeline for the universe is real.