“[This plugin] creates a bunch of new [WYSIWYG buttons which, when pushed, prompt] you for the video’s ID or URL and then inserts XHTML valid code into your post or page. […] This Plugins Provides Support For:
- YouTube
- Google Video
- IFILM
- QuickTime files
- AVI files
- MPEG files
- WMV files
- FLV (Flash video) files”
I modified the plugin just slightly so that each embedded object gets a named class (e.g. "youtubevideo") which I can then manipulate trough the stylesheet (like centering the video using display: block; and margin: 1em auto;).