I can put a custom button on the toolbar and insert custom html.

I need to take this a step further and have the image gallery/file selector pop up. User selects a file and my custom code is pasted into the editor with the selected filename inserted into my code.

 

Exactly like the image/flash/media button option, but my code with insert a flash video file instead with the location of a flash player in the url as well.  eg. \flashplayer.swf?file=theselectedfile.flv

 

Note, I will be using the existing image/media dialog box, not a custom one. The only difference to this and the existing one is the pasted html.

 

Could you tell me or point me at code examples at how to do this?