i would just make a one video ( make sure when you make the video you make it somhow that keeps the watcher on the video for atleast 10 sec). 1.make a twitter accounts 2. make myspace account 3. make facebook account or any other social networking and just send add frieds and followers and you're gonna get so much hit ,that my idea of doing this. good luck
If your video is related to another popular video then you can link it as a 'response'. This will then show up on the other video as a video response.
The success of this marketing technique will depend largely on the number of views on YouTube, your promotional video will be. The views over it, the more it will rank in Google and YouTube. And the higher the rank, the more views and mileage it receives. http://www.PimpMyViews.com
post your videos in social networking site like face book, orkut, twitter etc....then you will get more views