Attached Link: http://atube-catcher.dsnetwb.com/get-video-software-windows-home/content/banco-datos-Welcome-Home-Pa

Try the link above - it's free.  Plus you can select which codecs to use if the default AVI one doesn't work with poser.

If that doesn't work, set the conversion codec in that app to WMV.

Bring the converted FLV into Windows Movie Maker, export it as a WMV  and then use this.... 
http://www.appfree.net/wmv-to-avi-mpeg/
....to convert from WMV to AVI.

You'll have to play around a bit to get the best quality but a mix of these and other stuff you have on your drive will do the trick.

I've just created a presentation where the video sources came from many diverse sources including youtube (with approval), animations from poser 4 and 8 and all put together using the bog standard Movie Maker and it looks OK  even on a  large 6ft electronic whiteboard.

Pinky - you left the lens cap of your mind on again.