I'm actually pretty amazed at these videos that were captured on machines with high-end video cards.

Here's a few good ones. When they load, hit pause and let them buffer all the way before playing, it will be smoother.
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<embed src="http://www.simtube.com/flvplayer.swf?file=http://www.simtube.com/flvideo/883.flv&autostart=true&showfsbutton=true" loop="false" width="320" height="260" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /></object>

<object type="application/x-shockwave-flash" width="480" height="390"wmode="transparent" data="http://www.simtube.com/flvplayer.swf?file=http://www.simtube.com/flvideo/963.flv&autostart=true&showfsbutton=true"><param name="movie" value="http://www.simtube.com/flvplayer.swf?file=http://www.simtube.com/flvideo/963.flv&autostart=true&showfsbutton=true" /><param name="wmode" value="transparent" /><param name="allowScriptAccess" value="sameDomain" />
<embed src="http://www.simtube.com/flvplayer.swf?file=http://www.simtube.com/flvideo/963.flv&autostart=true&showfsbutton=true" loop="false" width="320" height="260" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
</object>