I think you have to render it 1st, free elite users can render up to 30 sec videos, premium users can render up to 1 min videos. (not really enough i think)
Obviously you render a video you've already uploaded in mw3.
Once rendered it will appear in elite & directly sent to your you tube account (assuming you have already linked it during elite set up).
Remember, the render option in mw3 will be greyed out if the video exceeds the duration limit
Well You Have To have made your 1min Clip with premium,or your 30 second video with non-premium.
Then you go to the site and link your account with youtube.
dadada typpe in your stuff, go to mw3 go to your vault,then it will give you a chance to render it,it wont say it if its 31,or,32, excatly 30.
then it will render replaying the clip..then wait like 2minutes.go to youtube,check "My Videos" and it will be there,trust me. il show you my video i used from mw3