[any ANONYMOUS forum user]

How to download free HD porn video from HD PornTube?
http://www.hd-porntube.com/video/Amateur_Teen_Orgy-1172/

[Stream Recorder]

Not sure about HD videos from hd-porntube.com, but free SD videos from this site use HTTP protocol. You can download or capture them with freeware Fast Video Download (http://www.applian.com/fast-video-download/), Freecorder 4 (http://all-streaming-media.com/record-audio-stream/FreeCorder-Toolbar-Free-sound-recorder-software-Windows.htm), Jaksta Free Media Recorder (http://all-streaming-media.com/record-video-stream/Jaksta-Free-Media-Recorder-freeware-download-capture-video.htm), commercial Replay Media Catcher (http://all-streaming-media.com/record-video-stream/Replay-Media-Catcher-HTTP-RTMP-FLV-MP3-ripper-recorder.htm), WM Recorder (http://all-streaming-media.com/record-video-stream/WMRecorder-One-click-online-audio-video-stream-recorder.htm) as well as many other programs.

See also:
FAQ: How to record/download/capture/save Adobe Flash .FLV video HTTP stream from embedded player (http://all-streaming-media.com/faq/recording-media-stream/faq-record-download-capture-save-flash-flv-video-http.htm)