WebVideoCap is a portable tool and is very simple to use. You only needed to click on the ‘Start Capture’ button in the application’s interface to capture the video. There are only a few options to select like Capture buffer size, scan method (Raw sockets and WinPCap) and save folder location.
WebVideoCap [via - ghacks] works under Windows 2000, XP, 2003 and Vista systems. It lets you capture Flash video files (with .flv extension), Microsoft Windows media files (with .wmv extension) and RTSP/MMS video streams.