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

i cant either and its killing me! If u know wat to do i'm on PS3 Tru_Story1286 message me or something! Only thing i can do is share screen shots!