I suffered from the same problem with you before. I tried the Real downloader, the speed is really beyond my tolerance and I unloaded it. Then,One of my friends suggested me to buy a software-video download capture. The feel is awesome! I feel free to download the video off NRL.com now. Sometimes I could also convert it to the format I like and sent it to my Android phone . It is really a luck to find this software . Load onto this website: You owe me a thanks!
I don't believe you can but you can use a Youtube video downloader and get the vids from this guy on Youtube who uploads most of the highlights daily.
As far as I know. You can't. Although you could get a youtube downloader, look for the video you want and (if it is on youtube) download it.