If you need to enter a user id and password on a web-site, it doesn't necessarily mean that DRM is used.

Do you download f4v files to your computer and need to enter your ID and password when trying to play them?

Or do they use streaming videos instead? Have you tried to download/capture f4v video streams with Replay Media Catcher, Jaksta, WM Recorder or freeware programs like Grab Pro, CooJah + Blader, TubeMaster++, xVST?