What if Galileo was wrong? Or what if he was only half right? What if some things can be hypothesized and proved with evidence, and some things can't?
If Galileo was wrong, then someone else would figure it out...or if he was half right, someone would figure out what he missed.
Oh, by the way...nothing can be proven with evidence, merely supported with it.

If something can't be supported by scientific methods, then it's not science...that's all there is to it, really. It basically ends up as something in philosophy or legend or religion which are speculative and faith based things.
By ruling out the possibility science can't explain everything right now, you kinda take yourself out of the game.
The day that science thinks it knows everything is the day it stops being science and become religion. Science by its very nature is a never ending quest for knowledge. That's how scientists keep job security.

Seriously though, everything is always being investigated, new things discovered, things rewritten, things tossed out, things being supported...science can be pretty dynamic. However, all those changes or discoveries or evidences have to treated a certain way before they can be added to the community as a whole.
Sure we don't know everything, but that doesn't mean everything we know or think we know now is a sham. Based on our evidences, this is how the world works...and if we're right then the technology we create based on that will work as well. So I guess that amounts to some form of "proof."
As stated in the video, if bad science exists then it will eventually be discovered and discarded. All that takes is research and time. The real point of the video was to show all of the work that goes into the formation of a theory...as you can see, it's quite a lot. That's why we don't take "creation science" as seriously as people seem to think we should...there's no evidence, no one does research, it's merely a religious assertation. We can't just accept it as a theory...because it's not.
~Zoo