Soldato
YouTube is completely different. You won't see top movies to download on YT because YT will take them down, this was probably not the case with MegaUpload.
I have seen (and admittedly, watched) a few full length films on Youtube over the years. Some of them had been up for years at that point anyway. Both Youtube and MegaUpload work in exactly the same way in that they do respond to requests to take down 'pirated' material, they don't go all vigilante and start searching and taking them down of their own accord - can you imagine just how much effort that would take?