Grab Downloading Flash Video is a Bash script designed to be called via a Linux GNOME Desktop custom shortcut key while a Flash video is playing in your Firefox or Chrome browser. The script attempts to find the file being downloaded, waits for the download to finish, and then copies it to a configured directory. Prior to Flash 10.2, it was easy to find the file yourself in the /tmp directory. But starting with version 10.2, this script is more useful because the file is deleted but internally still open. Note that this is not a universal solution. Some sites, such as YouTube, make it easy to find the URL of the Flash video file. In those cases you may have better success using a download utility such as 'youtube-dl'.
