Ty, I downloaded divx, xvid and virtualdub who compressed my 900MB uncompressed file down to 50MB. My problem was that I had only downloaded videolan and no codexes

Thank for the tips about 64 bit, would probably need to run poser in 64 bit  so I save as uncompressed and convert later, might think about saving to images as it should be easier to redo part of a animation.  

Anyway, had to resize it to make youtube take it
http://www.youtube.com/watch?v=xlpivMK6JAU

is it a way to get youtube to loop a video, this is designed to run in a loop, the other option is to but the loop scene in many times after each other.