The video is a what if various planets were as close to us as the Moon in the night sky...Mars, another Earth, Neptune, Jupiter. If you replaced the Moon with Mars - it's twice the size...the tides would be devastating. If the Moon was replaced with Neptune, tidal lock would stop the Earth's rotation. Jupiter would almost fill the sky, but suffice to say, I think that would make Climate Change seem trivial.
The threat Jupiter poses is overrated. It is so light that if it were to fall into one of our oceans it would float, albeit the event would seriously disrupt tanker traffic and impair petroleum deliveries around the world, so in that sense it's best if it didn't fall into an ocean. As a matter of statistics the probability of that ever happening is about the same as the probability of Arthur Dent ever becoming actually comfortable for any length of time so we're safe.
It's all just random thought - the planets aren't likely to be exchanging places anytime soon - but Jupiter's so big compared to Earth that it wouldn't so much fall into the ocean as envelop everything in a really smelly, funny coloured fog. But, given its size, the pressures at its centre must be enormous. I think it was Arthur C Clarke who suggested Jupiter's core may be diamond.
The video was merely to illustrate how small Earth is relative to other planets....some minor controversy of just how much of the sky Jupiter would fill. I added a point that in the almost impossible instance one of these planets were to replace the Moon, it would change the Earth itself, probably making it uninhabitable.
And that it did. But you didn't really expect the thread to end there, and to stay on topic, did you?
I'd consider this thread pleasantly going to a related topic/thought exercise: What if a larger planetary body replaced the Moon - what would happen to the Earth?
