Between being classifiable as an INTx (I put the x there because how I score after the 'T' varies depending on my mental state and energy level when I answer the questions, but the INT part is consistent) and being on the spectrum, socializing is very difficult for me. Most of the time, I don't even want to socialize and would rather be alone.
When I am home alone (almost alone because we have a sweet, very old Australian Terrier named Tigger who is usually napping nearby) I also have the house rather quiet with no TV, radio or stereo going. I sometimes turn floor fans on as much to circulate the air as to create white noise that helps drown out noises from outside the apartment. I've got headphones for my PC and portable stuff so that I can control the sound from them until it is just right for me. I often turn the TV volume down so that it is just loud enough for others to hear it and I got a sound bar for it so that the sound can come from right underneath the coffee table by the couch and chairs so that people can hear without having to make it loud. When I play video games, I sometimes even turn the sound off. Sometimes, I find that I perform better in the game without sound as long as sound isn't integral to how you play the game.
I have the curtains drawn most of the time, except for the kitchen window so that the houseplants can have some actual sunlight. I have the brightness and backlight on all of my screens (TV, desktop PC, tablet, Nintendo 3DS) turned down as low as I can while still making it bright enough for others to not think they are too dark. I wear prescription sunglasses when it is really sunny outside and prefer to go outside on cloudy days or early in the morning or in the evening. When I'm outside on a sunny day, my wife might be sunbathing by the apartment pool, but I'm under an umbrella or the pergola in the shade.
Social interaction is like another irritant for me on par with bright light and loud noises. I love, love social media sites like Youtube, Facebook. Twitter, MeWe etc. because I can interact with people on these sites with a keyboard rather than having to talk out loud in real time. The stress and effort of trying to keep up with a live in-person conversation where I can't sit back and think about what my reply to something is without the other people thinking that I'm weird is sometimes just too much for me. I spend most of the time in a social situation sitting there quietly, listening to the others talk. Sometimes, they ask me a direct question about something that I know a lot about and/or find very interesting. I save my energy for those moments because it can be fun to talk about stuff that I already know a lot about with others.
Like you say in this excellent video, trying to manage mental and physical energy isn't easy when you don't have a lot of it to begin with. People say 'You should exercise, that'll help you have more energy'. I tell them that I do exercise. I walk several miles every day (usually on a quiet back street that runs next to our city block and that people rarely walk on, so I don't have to expend energy on encountering them). Also, I play games on my Nintendo WiiU that require you to stand up and move your arms and legs around rather than just sitting on the couch moving only your fingers. I don't have very fast reflexes, so I never score very high, but I accept that and I find ways to have fun in the games that doesn't center on scoring high or advancing levels.
To me, talking with people and having to be social is also like exercise and playing a game. Heck, even getting into chats on Facebook Messenger is like a game to me in which the goal is to have a good interaction with the other people and to possibly learn more about them and the subjects at hand.
All of that takes energy. One analogy that I've used to help people understand is comparing how I am to a wizard in D&D. In D&D and many other RPGs and fantasy novels and video games, the wizard is one of the least physically powerful characters among the heroes, so he needs the protection of the fighter, barbarian, ranger, rogue, etc. However, he does have special abilities that the other heroes don't have (in my case, I'm usually the best at seeing all sides of a problem or issue, noticing things that others totally miss, coming up with out of the box crazy ideas that usually work, etc). The wizard's ability to do these things is limited, so he has to wait for the right moments to use some of that energy to do things. If he uses up all of his mana, he has to rest, recharge and study some more before he can do anything for the rest of the day. For people I know who are into RPGs and are familiar with Dragonlance, I can compare it to how Raistlin is, especially in the early books. I don't have an almost uncontrollable cough, gold skin, nor hourglass shaped irises, but I am otherwise in a similar situation as he is when it comes to how much energy I have between rests.
