I wondered much the same and found the answers after a bit of searching.
It really is simple. There are some sophisticated hacking programs out there in cyberspace that absolutely KILL connections when they are enacted to capture video and images.
Don't blame rlc, ask questions of those who hack the site to provide others with good quality images and video feeds. They are making dollars from their capture efforts.
I suffer the same problems Mike, feeds freeze and the good moments are missed. This happens here because I have a slow net connection and notice that the feed freezes are always higher on the "free" cams on rlc.