Dave, I'm somewhat confused by you posting that video, mainly because you didn't explain how it supports your side... Nothing in it contradicts the idea that we've been to the moon, even showing how dangerous it was, and what kind of an obstacle NASA had to overcome with the vacuum of space. Now, the clip at the end of that video, of the man using a vacuum chamber with the water? I'd like to point out that there's absolutely no way he would have been able to get hard vacuum with his setup, as the motor he used is nowhere near powerful enough, and I'm pretty certain that the glass would have shattered and imploded long before reaching hard vacuum.
His experiment at the end also confirms (albeit indirectly) that gravity does exist.
When you go up in altitude, the barometric pressure decreases, and the air thins. It's not as dense as at sea level. If the flat earth model were true, and there was no such thing as gravity, only buoyancy (or whatever their model says is the reason things fall), then if you go up in altitude, the barometric pressure should not change at all, because air is air, whether you're at 1 foot or 10,000 feet above sea level. If flat earth were true, as the atmosphere is the same wherever, then it should all be at the same pressure.
However, thus is not the case, and to reiterate what I said above, as you go up in altitude, pressure decreases. This is caused by gravity pulling the molecules and atoms in the air as far "down" as possible, and is the reason that water (a combination of H20 molecules, and H and O atoms) will evaporate and condense at the same time, keeping the amount of water in, say, a cup, about the same.
When you raise the temperature of the water, it eventually reaches a boiling point, and the water boils. At sea level, the boiling point for water is 212 degrees F. However, at 10,000 feet ASL, the boiling point of water is only 193 degrees F.
But when you get to the vacuum of space (or, as in that video, in a vacuum chamber), water boils below 100 degrees F, and that's when the human body starts to have issues, as the average body temperature of humans is 98.6 degrees F. When your body, which is about 50-75% water (depending on age and gender), comes into contact with hard vacuum, the water will start to boil, hence why in the video you posted, the astronaut said the saliva on his tongue started to boil.
And this is all because of the amount of pressure being exerted on one's body.
I'm pretty sure that if someone were spaced (ie, kicked out an airlock with no suit), it would not be a very pleasant way to die. Having one's body freeze while the water and other fluids in his or her body begin to boil, the air in his or her lungs expanding inside the body, forcing its way through ones mouth and nose... And I think I'll stop there...
Yeah, not pleasant at all.
Thanks for looking at the whole clip.
The main point was that an attempt to use the vacuum chamber, with a man in it, the suit failed.
The space suit failed badly and as far as I can tell that experiment was never tried again in that particular type of chamber.
--Dave