Every time asking password to upload video to youtube in Windows Movie Maker ?

I am uploading more videos to you-tube using windows movie maker. On ever time before while uploading movie maker asking you-tube user id and password. For this reason, Please suggest how to save youtube user id and password defaultly taken and need to dont ask again.

and one more thing, no need to come "Add music" for my uploaded videos. Please suggest how can i follow for both these questions. 

Thanks in advance.