I'm using Moodle 2.3. If I choose to add a, for example, .swf file within a page content, considering the media filter is on, I can control the size of the video adding a ?d=WxH at the end of the link. But how can I control the default size of a flash video when adding a resource > file and choosing to show as embed?
It is possible to resize the window.
change the object parameters (Height and Width) in style.css file with whatever you want sizes.
You just clear the cache in Moodle
Site Administrator -> Development -> Purge all Cahes and click on "Purge all Caches" Button and refresh your course page.