Code:
rtmpdump -r "rtmpe://cp72511.edgefcs.net:1935/ondemand" -a "ondemand?auth=eaEbKcLd_bncVbbaEdjcwdWdSa6bMdubGambrbbd1ckcqapchaucadwasdFdJdLatbV-btBnIv-eS-azt4FBqlCsxp&aifp=v002&slist=production/" -f "WIN 13,0,0,206" -W "https://www.itv.com/mediaplayer/releases/2.10.11/ITVMediaPlayer.swf" -p "https://www.itv.com/itvplayer/celebrity-juice/series-11/episode-10" -y "mp4:production/priority/rtmpecatchup/800/33/1-7045-0137-001/1-7045-0137-001_celebrity-juice-(series-11)_tx080514_itv800_16x9-reg.mp4?sessionId=97B2BA40-03C0-A878-3FEC-CD884A89E79C" -o "output.flv"
you can download via rtmpdumphelper
this is the code with rtmpdumphelper, but is expired