if you want to resume your broken download, add this in command (look at bold section):
Code:
rtmpdump -r "rtmpe://fms.1B42.edgecastcdn.net/001B42/vault/videoclips/movies/" -a "001B42/vault/videoclips/movies/" -f "WIN 11,1,102,55" -W "http://www.bigflix.com/apache_file/flash/Player.swf?f=1322768888359" -p "http://www.bigflix.com/home/movies/movie-name/html link movie number" -y "mp4:moviename.mp4?e=movie vault swf number" -e "mp4_moviename.flv" -o "mp4_moviename.flv"