Please watch my video, Can anyone help diagnose my car's problems?

Why does it "jerk" as shown in the video.. Make sure to turn up your audio, so you can "hear the car"

http://youtu.be/ckjrhsYlBoQ<div class="progress-bars"><div class="progress-bar-uploading"><span class="progress-bar-percentage hid" style="display: none">
Thanks!</span></div></div>