Fix my video intro animation.

My final video is complete. I've uploaded it to youtube, only to find that the intro (9 seconds) is shaky and skipping (online (youtube) and offline). the format of all parts of the movie is .mp4 and the movie itself is .mp4. I tried to convert the intro part into the .wmv , since I am using windows movie maker 2012 to connect the parts together. Can you help me fix this issue? Thanks, Hadeel.