rendering videos

some of my buddies at work keep telling me to post some gameplay to youtube, so i created an account and went through the steps on elite to link the account to elite, and went to the vault section and made a short clip of some gameplay, but when i click on it in my vault, the "render" option is grayed out and i cannot click on it, any ideas since i am a total noob to the posting videos on youtube. thought it would be cool though to at least try it out.

any suggestions are appreciated, and can you post an entire match through the theater/vault to youtube, it seems like in theory it would be easy so i dont know why i cant figure it out.

The video must be 30 sec. or less. Hope this helps.

didnt they change it to 60 seconds?

Yes this does help I will give a try. Thanks guys