The comments about scientific mysteries are often very spirited.  One in particular on this thread is about solar eclipse.

Commenter CC had this to say:

“Earth’s moon is the only moon that perfectly eclipses the sun” People gotta learn what a “perfect eclipse” would be. It means that the object in question would completely obscure the sun every time it passes in front of it. Our moon rarely has total solar eclipses and even when it does, you can still see the Sun’s corona around the moon and see it strongly through the craters and valleys on the moon’s surface. So no, no perfect eclipse.

Commenter Rafiqul said this in reply:

Common, you don’t need to be on the ground, you can easily calculate by the diameter of the moon and the distance from the planet and the sun. It is just very simple math. And that’s the way we calculate when is going to be the perfect eclipse and which area on earth.

What do you think about this video do they make valid points or are there other explanations?