url helper will get you 60% or 70% of the link and in general, it is a good tool for "beginners", but not for comlicated streams or in-depth analysis. You can try other tools like wireshark, fiddler and of course rtmpdumphelper.
For "Canal + Film2" here is the link I got using rtmpdumphelper.
Do some reading, download the tools, and get busy playing with them and doing a lots of "error and trial" attempts.... imho, that's the best way to learn
Code:
rtmpdump -r "rtmpe://89.248.170.199:443/liveedge1/" -a "liveedge1/" -f "WIN 11,9,900,117" -W "http://srvadsense.com/jwplayer/jwplayer.flash.swf" -p "http://srvadsense.com/gen_s.php?id=20243&width=640&height=400" --live -y "canalfilm2745" | "C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" -
Good Luck!