Damn, you use realmedia? Wow, I figured people quit using their proprietary formats these days.
Depends on what the content provider wants though, if they don't want you to store their content localy, then they can tell the player likewise, and it wont allow you to do it. I would just remove any realmedia software if I were you (its spyware, even if you buy the commercial version), but thats just me.