when u r viewing any video over the internet, u r actuallty downlaoding the video. If u r using IE then go to ur default internet cache folder. In that folder look for all subfolders. U'll certainly get that video file.
OK seems nice. The RAM u r saying is actully 512 Mb but u must be having a 8 Mb onboard Graphics card. That is why it is keeping ur system memory (RAM) reserved for itself.
Bye.