As 2 4 k "hit the nail on the head", I will expand on what he said. The site looks very untrustworthy and has very limited detail and the product itself looks very limited in features and design.
Theres much better scripts and programs out there that are far cheaper (free to $10) and also far better in terms of design and features. Someone thinking of buying your product just has to do a simple search on Google for 'video script', 'YouTube Video Sharing Script' etc.
Just take a look at some of your competitors:
http://www.clip-share.com/
http://www.phpgator.com/
http://www.vidiscript.com/
http://www.videoscript.us/
http://www.mediascripts.com/
This is just some basic ones. Your biggest competition is prob the three following:
http://www.phpmotion.com/
http://www.vshare.in/
http://www.phpsugar.com/phpmelody.html
These are the best three out there in my opinion and I have personally used them on my own sites etc. They are free, cheap, easy to use, and very functional in features and design.
The script your selling could easily have been downloaded from free script sites such as:
http://www.hotscripts.com/
Sorry but thats what is looks like. Sorry if its not and you put effort in to code it.
I think to succeed you should improve on the script and maybe give it away for free providing the user of the script leaves a backlink on the site to you or one of your sites etc. You could even give it away for free providing the user lets you have a ad block or adsense strip on their site etc. Many websites use this technique for giving away free products and services such as free website/hosting services.
If you sell it you could offer some bonuses with it maybe the following:
- Make money from youtube guide ebook
- Monetise your youtube site
- Youtube tools (video converter, downloader, watermarker) etc
These could be used as incentives to buy your product rather than the rest. You should also build a list so you can market youtube/video related products and money methods etc.
Hope this helps and its just my 2cents.