But do you actually do any DIY? And is it more than you would have done without watching hours of it on YouTube?

I have at times watched a lot of videos of people making stuff or doing DIY. I suspect like 99% of the audience of those videos, they are just entertainment.

not OP but I am forced to. Services are too expensive these days and even when you pay, the quality is usually very hit or miss. I have lost count the number of times where a mechanic does the job right but its sloppy. Even my plumber or electrician gets things done but my drive for perfection cringes at the sloppy craftsmanship. I'm not a multi millionaire so I can't get the people that supposedly made things like Apple Park. A DIYer might not be able to do every job but many of the low hanging fruit can be done well.

Yes, I do a lot. Everything I feel confident doing and have the time for.