I had two different people from opposite sides of the US ask almost the identical question about using video recently. The question was roughly, "How do I sell video to agents when they can't post video or YouTube links on my local MLS.., agents don't have a clue what to do with the video".
One of the key things about being successful with video, I think, is educating your agent clients in how to use video to market their listings and structuring your video product so that it solves your clients marketing problems. My experience is that agents understand very little about online marketing of their listings with new technology. The younger agents understand it more than the old timers. You need to educate them and sell them a solution to their needs.
There are some basics on this subject (my apologies to those outside the US 1, 2 & 3 apply to the US only):
Another thing you can do is find a tour vendor that allows you to embed YouTube video in a traditional type of tour or property site. If you provide a tour or property site that embeds YouTube video you kill two birds with one stone. You get the traffic benefits of having the video on YouTube and you can provide a tour or property site product that has video in it along with stills, maps and other standard tour features. This is a feature that's starting to spread and I think will be standard soon. Here's an example of what a tour with embedded YouTube video looks like. pfretour.com and My single property Websites allow embedded YouTube video and they syndicate to many national real estate sites as described in #2 above.
Real estate marketing with video is an area where to be successful you need to do more than shoot the video. You need to understand online real estate marketing and show agents how to use the product you are selling them.