Google Analytics is a very popular app for tracking and monitoring your website visitors.
Google recently announced the feature of tracking your flash based applications.
Flash is difficult for search engines to parse through but Google has made it easier to enable your flash apps and especially videos to be indexed by them and track metrics.
Now you could answer typical questions like
# How many people have watched my video?
# Are we developing the right creative that attracts new users?
# How effective is my content at getting people to take action?
There could be other Flash based metrics that you could define but this is definitely an excellent start.