Here are some resources I found helpful for viewing online video.
The website Video Snag is a good place to download video from Youtube, Google, BlipTV, MetaCafe, Ifilm, DailyMotion and MySpace. Just copy and paste the target URL to save the video file.
DVD FLICK provides a very good free software package that converts your saves flash video files and burns them directly to DVD for viewing on any player. This is a great time and memory saver if you have a DVD write drive.