Youtube for sure has the world's best geeks, and they know how to stop people to fake them. They are now using cookie to track your activities on video view. Thats why you can not fake them so easily. Number of plays from a single IP is monitored. So when you are trying to do this from a single IP, your view count will stop immediately. Your video play count will stuck.
The cookie currently youtube is using to track people's IP is as below format.
To overcome this, I know one way, but this not the strongest way i believe. If you use 1000 very good proxy list, and browse the video view page with a script using the proxy list, Youtube will assume that the hit is coming from different regions and places. They will use different cookies for each hit. Believe me, this works stunningly. But you need to collect some excellent proxy list. By this you can increase around 10-20K hits for a video per day.
If you want to know how to use proxy with Perl/PHP/Python script then check my previous post http://icfun.blogspot.com/2008/03/bot-to-increase-myspace-video-view.html related to increase the view of myspace video count.