> I'm having an issue with some videos in that the still that comes up
> in the YouTube gallery is some kind of green noise, while others come
> up with just a black frame.
> Any way to control or predict which frame gets used?
You can go into the details about the video and choose from several
still pictures. Vimeo (another video hosting service) gives you more
choices including the ability to upload your own art. You can also
change the video later, if for example you re-edit the piece, and keep
the statistics. Youtube doesn't support this.