I love ghost videos on YouTube. There is one clip that's got a girl looking into a mirror. As she turns her head the reflection stays still. This is obviously fakebut I can't work out how it's done. If you get a chance to see it do I think it's a computer graphics trick
^you just won the strangest thread on EC! But in all seriousness, I don't think its a computer graphic trick, I think they hired a ghost... i know i know, ghost are very greedy but what can u do, u must have a succesfull youtube video SOMEHOW !
Oh man, I think I know which one you're talking about! The one with the japanese girl right? It can all be done using layer masking in a video editor. ... alternatively, bribe a ghost!