I have a Phantom 3 Advanced and when shooting video it is fluid and then goes to frame by frame then back to being fluid and so forth and so forth.  I have tried changing different camera settings but it has not corrected my problem.  What am I doing wrong?

Are you talking about playing the video back on your computer? If so then it's your computer, try a lower resolution like 1080 or even 720 then play it on your computer.