14 DAY TRIAL // Multiverses are a popular trope in SciFi movies or literature and it's easy to understand why, the idea is quite interesting and exciting.
It also opens up a lot of possibilities for interesting or at least out of the ordinary things to happen in said movies or books.
The problem with that, if indeed it is a problem, is that there's no experimental evidence for any of the main multiverse theories around.
Minutephysics spends a bit more than a minute, five times more actually, to go through the three big multiverse theories and what they imply, with the caveat that none of this has been proven experimentally in any form.
The video focuses on Bubble "Universes," separate universes which are so far apart that they can't ever interact and may have slightly different laws of physics, Membranes as predicted by string theory's many dimensions, and finally the Many Worlds idea deriving from the fact that quantum mechanics seems to indicate takes one form or another randomly.