89.com seems to have no videos, just links.

Most porn web-sites use either HTTP or RTMP flash video streams, so you can try to download/capture/record porn videos using software mentioned in our FAQ.

• How to record/download/capture/save Macromedia/Adobe Flash .FLV video HTTP stream from embedded player
• Tutorial: How to record free streaming porn videos from 89 com with Replay Media Catcher

Please ask questions about particular web-sites that you have problems with.