While making money on video is illusive for many of us, begining to post video is not. Early this year the IAB released a terrific basic guide to the emerging video ad market. While In stream linear video ads are the most common revenue generator this guide shows the amazing tech advancement that have created a wide variety of ways to deploy video advertising on the Web.
There is also some advice on pricing:
"Prices in digital video suggest that the medium is quickly maturing. CPM-based pricing
is the predominant model for buyers, particularly the In-Stream, Linear Ad format (pre-rolls, post-rolls, etc). CPMs can span a wide range and are based on a number of factors including the quality of the site’s content and users, targeting capabilities, and individual programming."
Here is a chart from the report describing the different ways to add video ads to a Website: