So this is a QT movie that you think should be rendered? Im not sure i understand.
If the whole sequence is green for all your clips, you need to change your sequence settings to match your clips. Then you shouldn;t have to render anything.
If your clips are modified and need to be rendered, make sure your render settings are correct. Go to Sequence>Render All(or Render Selection) and make sure all the different render options are checked, including green. Then hit Opt-R or Command-R and it should render