@chris6137, earthquakes happen because of shifts in our planet’s crust.
Now, in order for another body in the solar system to affect what happens in Earth’s crust, it has to be able to exert some kind of force on our planet.
There are two relevant forces. The first is the electromagnetic forces. This is the force that makes magnets do the things they do; it’s also the force that makes tables and chairs feel solid (the electrons in the table repel the electrons in your hand, so it feels solid). If a comet or meteorite smashed into Earth, that would definitely affect Earth’s crust. But the electromagnetic force doesn’t work that well over long distances, and it doesn’t work for large objects that don’t have a net charge (like Earth or a comet).
The second force is gravity. Everything with mass has gravity. Bigger things have more gravity. Gravity creates tidal forces. Jupiter’s huge gravity, for example, is tearing its moon Io inside out through tidal forces. But, Jupiter is a giant planet, and Io is very, very close to it. Gravity rapidly drops off in force as you increase the distance (the inverse square law). Also, comets have very little mass and so barely exert any gravitational force in the first place.
So, there is no physical way that the comet could have anything to do with what goes on inside Earth’s crust. Except perhaps “Jesus magic”
I skimmed through the video but I can’t watch with sound (I’m at work).