I'm using WordTube on WP2.7 and perhaps I missed something in the instructions, but I could not get the video to load.
I had uploaded material into the Media section of WP and noted the ID number to place into the WordTube short code [media id=26]
Nothing was happening.
Then I noticed on WP2.7 that WordTube also has a section under TOOLS and when I uploaded the SWF file through this interface, I got a unique WordTube ID. When I entered that ID, everything worked.