Noooooo ........
So sorry if you can’t get it .... have you tried clicking on the individual segments at the bottom of the video (where sound control etc. is)? Maybe you have to manually go to the next section. When I played it, after the intro it stopped ....and I thought is that all? Then it finally continued to play after a few seconds. I just went to it and while the intro was playing, clicked the next segment and it played.
My kin, John Kirkpatrick, a private and carpenter from western Pennsylvania, was the only KIA from his unit during the battle. He died some three days after the action.