Really? He lost me when he "demonstrated" that his hard disk didn't boot in another computer because it uses UUID's. It's quite the opposite. When using UUID's it doesn't matter in which computer and in which order you connect the hard disks. The UUID stays the same until you reformat the filesystem. I have no idea what he did in his video. He also kept calling these UUID's a "security feature". Nothing to do with security.

Edit: Funny video to watch https://www.youtube.com/watch?v=IrgJ_fNJGJE
He has no idea what "visudo" does. It actually checks for mistakes he's talking about and writing to a tmp file first is by design.

Not only that, but Windows basically uses it's equivalent for where it mounts a drive, so both OSes behave the same in this respect.

If the GUID somehow gets assigned to a different drive Letter in the Registry (as will happen, for example, putting it in another computer with an existing drive), Windows will not boot.

One of my friends has been playing with a few live CDs since the experiment He asks: "why are the fonts so much less 'crisp' than in my Windows setup?". I have to admit, when i first started dabling in Linux i noticed that fonts seemed a little 'fuzzy' compared to Windows, though i don't notice it so much these days.

I disagree with him in that particular video. I think that is a bad idea to disable passwords.