Google Video Viewer
Full user review
"good, although only for google"
It does not asks you annoying questions. When you click to download GVI video it starts download in background. Few seconds before download finishes it starts playing. Or if you click it to play. If you interrupt download, next time you click on hyperlink or open unfinished file it would continue download.
It's part of video.google.com which is excelent! So any software that's part of it can not be as good as site.