There’s a big difference between someone lifting weights somewhere near their genetic capacity and someone spending many hours per week racking up long, slow distance on the road. Or someone spending a few hours waving one pound dumbbells around.
If you want to be able to get out of your chair at 95 and not develop osteoporosis, you need to engage in load bearing exercise. If you want to add cardio to that - do it faster. You’ll get your HR to 80%, no problem.
I’m 80. I lift about twice a week for about 90 min each time. On the off days, I walk for an hour, usually over hills, since walking on the flat doesn’t get my HR up enough, and I don’t want to stress my knees by jogging.
I think the lady looks great, probably a lot better than she would if she was a runner.