Guys, its not luck, its all about doing it correctly. Please follow the points below.
1] check the competition of the keyword you 're targeting (youtube keyword tool)
2] Make sure your keyword is in the title, body and tags
3] Write 400 unique content about your video in the body ( make sure to include your keyword)
4] This is important - if you need to get viral effect on your vid - you need to optimise it withiin 24 hrs of it being live. After this its very hard and almost impossible
5] get views, likes, comments (usual places)
6] Send your video to FB pages and twitter pages (be better if you target high volume pages - youtube see this as popular vid)
7] build backlinks - GSA, SEnuke, UD, what ever the soft you like (again target your keyword, 20% as one of your anchors)
8] Embed your vid to one of your high pr sites and create web 2.0 sites and embed your video and start backlinking.
I know its a lot to do with in first 24 hrs, but if you get the besic right you are in for long term relationship with this sweet ass.
Regards,
Switrch