I recently blogged about the fact that my sister wanted to download a movie file from picasaweb. Now I found a much easier way to do it. Just use firefox, add the “Download Helper” add-on.
There will be an extra button on the address bar. Just view the movie (whereever) and click the button. It will allow to download the movie-file (it will be an .flv file, which you can watch using vlc.