I haven’t listened to it, but of course it’s real. Why would you doubt it? I did see that person on I’ve got a Secret. The last person receiving a Civil War related pension died not so long ago. She was a woman who, when very young, married a very old man, and then she herself lived to be quite old. Too lazy to google, but if you do, share the link!
Listen to it. The audio is too clean,plus he doesn’t sound like a 101 year old.
Just my opinion.