The limitations of embedding files on Word Press

From these links it says that you can not use Javascript because it can be a security problem. Someone made Livejournal and Myspace shut down by using it. This limits the different types of video that you can stream from because Word Press does not trust adding a Flash animation directly. You would have to upload it on You Tube for example for it to stream onto the blog.

Also it says that you can only link to files from certain sources from Google Video to Splash Cast for security reasons as well.