Hey Mrs Thing, the jerkiness is either that you're playing HD when your computer can't handle it - in which case, turn it off (on-screen toggle, top right of screen) OR it could be that your bandwidth (speed of internet connection) isn't great - in which case, let the video load by pressing play, then pause, wait until the progress bar along the bottom of the screen has completed, then play. OR it could be both, in which case, do both!