Steam and YouTube are good sources of entertainment but use them in moderation. Because they’re fleeting and ultimately unfulfilling. There are hundreds of other ways to spend your time.
This isn't meant to be a criticism of your post, but as someone who fades in and out of this situation I want to say: "go outside" is not overly helpful advice for people in this situation. I've tried going outside but without a goal to fulfill or any idea of how "normal people" have fun, it's a struggle to make it feel any less empty than being at home. Obviously it's not your job to write a book-length guide on how to live a fulfilling life though, so carry on.
I've learned to at very least I can go outside and just be in the sunlight for a while every day. For me personally it often involves messing around in my garden for a few minutes or going for a walk. If you aren't able to do that mentally or physically then just sit outside on your porch or something and just be there observing the world. None of this stuff is a cure all but this is such a minimal thing that anyone can do and for some reason I feel a little bit better that day.
Create something. If you like games, learn to program and create them. Start with something small and easy like a basic platformer in Game Maker Studio. When you only consume and create nothing, you actually create depression.
But that's the problem. You can't. You physically don't have enough energy and motivation to do anything. Everything is boring and when you force yourself to do something, it's shit. The problem is that you can't enjoy anything and just feel shit and bored all the time.
Easier said than done, or "My goodness, what an idea! Why didn't I think of that? Just create something."
Particularly with learning curve (and needing to assess things) while lacking creativity(/ideas), motivation, energy, good status etc.
That, and it's easy for things beyond your control to change things. Destroying your interest in said creating (even if you've made something complete), turn it into lurking (waiting for someone else to make certain changes), or requiring finding a different avenue for creation.
I’ve done this except I wasn’t on a computer I was making a sandwich, and instead of spending 3 hours I spent 5 minutes. And instead of being sad I was happy cause I was eating a sandwich. Life is like that sometimes
I can say with 100 percent conviction that it is. Try a bread burger roll, whether you’re on death row or have recently lost a loved one, it will make you feel like you’ve won the lottery or pushed an old lady down a flight of stairs.