Video advertising is prevalent in a lot of videos you may come across on Youtube, and for good reason. Video advertising is a newly developed, comparatively, way of advertising that is easy to do and can yield high profits. The key is traffic, much like niche website design. If you can get tons of people to view your videos, then you can make money. It's all about traffic, without traffic you are dead in this field. While having a good video is of course important, the most important thing will be driving viewers to the video to watch it.
A good model to follow for successful video advertising would be:
10% time creating video.
90% time promoting video and generating links to it.
I can't stress enough how important it is to get people to watch your video. If you spend 10 hours making a video, you should be spending 90 hours promoting it. If it's good, people will watch it. If they don't know about it, how will they watch it? You must get it noticed on as many levels as possible.
Submitting your video on multiple public video hosting websites will be very beneficial when you are trying to get your video ranked high in search pages. Youtube cannot be your only video search engine that you publish your video to. You can find a list of video hosts by simply googling 'free video hosting'. Youtube, Google Video, Metacafe, and Megavideo are all great sites to submit your videos to in order to generate revenue.