The only problem with thunderf00t's video is that the topic itself is very hard to understand and subsequently very hard to explain and demonstrate in what appears to be a rushed video.
The guy himself knows his stuff in this area and i'm hoping he does another video with an experiment that shows the problem a bit more clearly.
The problem is that you need to invest significant amount of time into his content. He does debunking videos. So you need to:
1) See the original idea / kickstarter page
2) Watch the videos there
3) Maybe invest time into reading the company's communication on the page
4) See what others news outlets are writing
5) Think about the topic
6) Go watch his video
7) See the fallout and aftermath
You know, having a full time job and hobbies, following some tv series, I dont nearly have enough time to do all this, to have a chuckle, that some idiots try to tumble dry with vacuum, and some people believe it is. The problems with un-scientific prepositions, is that the burden of proof is on the debunker.
Most people know, that water boils at lower temperature at lower pressure.
Most people dont know, how this really works, and what is the temperature and what pressure.
And they dont know how difficult it is to make a vacuum chamber.