I've been watching a 24 year old guy on YouTube who's interviewing older people he meets randomly and asks them how old they are and other general questions about what it's like to be the age they are.

I thought I might answer some of these here, now that I'm older myself.

If I answered the first question about my age, I don't think my answer would be useful to many people because of the unique choices I've made about how I wanted to live my life. One of the best things has been that I've avoided getting addicted to "adult" type pastimes. I've only had to deal with getting paunchier from not knowing how to deal with what might be unique dietary issues. You cannot imagine how much respect over the years I've received from those who got to know me - all from not having adopted vices. 

If I were being asked for a three to five minute answer as an example, I'd mention how my adoption of a number of mentors had driven the expression of my multi-creative interests. Accepting that I was a multi-talent with needs to express multiple interests was key to my own self-knowledge. I would be in trouble if I tried to live my life like "normal people" did; these multiple interests would act like gremlins if they weren't taken out and exercised.

I also made some rare life decisions - such as not to spawn my own children. I didn't have anything against parenting and spent eleven years being a step parent. I didn't make this decision to not have my own kids lightly. I had significant health issues that I was told were hereditary. There was always the lucky chance that the person I chose to have kids with would prevail in the physical gene pool, improving my potential for healthy children - but I thought that passing on of these health issues that have affected my entire life would be debilitating, selfish and mean to do to anyone.

Plus, I really couldn't afford to be a parent because of these health issues, especially given the high likelihood I would become a single parent. Though the rest of my relatives have long-term relationships with no problems, I seemed to routinely choose very unique guys to couple up with who were somewhat to very difficult people. (For instance, my current relationship is going through a rough spot right now because of his personal challenges that I'm really hoping will be resolved in positive ways.)

There were other questions that @sprougt asked those he encountered...something like, "if you had advice to pass on to younger people, what would it be?" 
I'd say, especially if you're a smart person, be sure to study and improve on your own communications skills, especially your ability to speak about subjective, emotional topics. Because if you discover information or an invention - anything notable or specialized, you're going to want to be able to present it so stupid people who happen to have money so they can support your inventions.

"What was a big risk you took in your life that you learned a big lesson from?"
Hitchhiking isn't as risky as people made it out to be. I met so many interesting people, (some of whom became fantastic friends.) Hitchhiking did make me more observant so I could avoid possible problems; turns out that using my intuition over and over again protected me. Happily, intuition and reading body language cues could be learned and trained over time.  

There were more questions, and of course I can answer the ones differently - but I'll do that next time...