@Booklady,
Here is a link to the battlewalk site:
https://pcntv.com/gettysburg/
National Park Service rangers have been battlewalks for a number of years. These are tailored to an individual aspect of the Gettysburg battle and are recorded on the site where the topic took place.
Pennsylvania Cable Network sometimes video tapes these battlewalks and, in the late 1990's and early 2000's, had them for sale as DVDs on the above web site. Maybe they still are available as DVDs. A few were offered for purchase as digital downloads.
Apparently they are now available by subscription at the online web site.
It literally is though you are a visitor accompanying a licensed battlefield guide on on of these topic tours.
Each is an hour or more in length; the camera focus is on the NPS narration.
My only negative is I wish the camera would pan around more to show the terrain.
I enjoy them tremendously as it probably is as close as I'll get to the Gettysburg battlefield now.
I've learned an enormous amount about the battle from watching them.
The NPS guides do a fantastic job.
Many of these are also available for free on YouTube.