I was extremely skeptical of the title, but he makes a good case. Still it's very unlikely aging is evolved. An animal that lives longer would be able to reproduce more, therefore there is selection pressure for longer (reproductive) life spans.

It's far more likely there are other reasons. For example limited telomeres prevent cells from multiplying out of control. And if aging was easy to biologically prevent/reverse, we would expect to find a few people out of billions that live far outside the normal life expectancy. Like someone with a rare combination of genes that happens to have longer telomeres or younger hormones etc. Instead everyone dies pretty consistently within 90 years, give or take a decade.