I sometimes have no choice (eg. university course materials) so I have a strict policy of only using Flash to generate the request parameters necessary for tools like rtmpsrv to dump the video to disk for MPlayer-based playback and preservation.
Originally Posted by kpedersen
(I use rtmpsrv for two reasons. First, it's more robust than rtmpsuck. Second, I consider it a feature that it prevents the flash player from playing as the file downloads. I only ever see content that I get to keep.)