I guess you could add a progress bar per page, and use type of ‘custom’ instead of ‘table of contents’. from there you could modify the progress bar value to show progress, maybe triggered by when different things happen on the page where progress would be evident. Pages are not timeline-based (like say captivate). So trying to control/view the page like a video will take a bit more work to accomplish…. If the user is not really interacting with the content on the page, but viewing it like a video, then you could always create a video using Camtasia and drop that on your page (if you have Lectora Inspire that comes with Camtasia). Hard to say exactly without knowing what you are working with.
If you have a way to show an example page to the group here, we might be able to steer you in a better direction.