This is going to be a very simple opinion, based on 65 years of shotgun shooting, buying, and collecting experience. If I started my shotgun's life at new condition, and shot it with sensible loads, here is what I think. Let me tell you what my shotguns are. Parker 12 gauge, 1 1/2 frame, 7 pounds 4 ounces, Lindner Prussian Daly, 12 gauge, 7 pounds, 4 ounces, James Purdey hammer pigeon gun, 12 gauge, 7 pounds, 4 ounces, Lefever sideplate G grade, 12 gauge, 7 pounds, 4 ounces, all fluid steel, non ejector, and, I will remind you, new condition no appreciable rounds shot. I could shoot any of those guns for any lifetime, mine and the previous owner, and the guns, all of them, would be in shootable condition in 100 years or more from now. It all depends on lubrication, loads, amount of abuse, and intelligent opening and closing of the guns, and a very little maintenance. The video may have covered these factors. I will watch the video.