I'm attempting to create a simple help video where I demonstrate the use of an online application, so I'm using a screen recording as my source video. I've created a shape layer that will serve as box to highlight a certain part of the webpage I want to draw attention to. In this scene, the page scrolls down. At this point I would like the highlight-box to scroll with the page. I've attempted to use the Track Motion tool to target the highlight-box to features on the page. However, the tracker is doing a horrible job of tracking items when the page scrolls. I've attempted to position the motion tracker on to many of the page's items, but it's just not able to get a handle on anything effectively.
I've read through a few different tutorials and watched a couple of videos too, and so I don't think that there is a problem with my work flow.
Is anybody able to tell me why I am having such trouble tracking this scroll motion? Does anybody have any recommendations for solving this problem?