I'm 99% sure this is impossible (unless you're a major corp paying YT a load of cash). To be fair to them it's a mechanism to stop people loading a video on one subject, getting big numbers and then replacing it with another. If it was allowed this 'bait and switch' would allow someone to put up, say a Justin Bieber original track, get a few thousand views and them switch it to their own song while retaining the view count.