Pausing timeline when pausing a video

I am having trouble adding shapes on top of a video I embedded in storyline 2.  I created a video that explains how to use a certain website, and I am trying to add rectangles and lines to point out certain actions I make in the demonstration.  However, everytime I pause the video to add a shape, the video goes back to the beginning scene, and the slide shows all the shapes in that slide.  Though I could figure out when I wanted to add shapes, I can't figure out where to put them, because each time I pause the video in the timeline, the video and slide just go back to the beginning.  Is there anyway to stop this from happening?  Or is there another way to accurately add shapes to a video?

Thank you,

Marina