Nobody is as good as the keyboard commandos say they are. Want to shoot the wings off a fly at 100yds with iron sights from a 2" revolver?
You do it the same way they guys who claim to have done it did it. You type it out, and hit the "enter" key. OR for the video guys, take a picture of the wingless fly and claim to have done it...
Personally, I'm not a big fan of watching Utube to learn things. Usually what I see is 25hrs of watching crap to find 20 minutes of worthwhile information, and most of the time, its information I already knew.
My personal shooting experience showed me that i had "plateaus" of skill. I would reach a certain point, and then no further, and pushing myself never seemed to change that. For me. Just relaxing and shooting, not worrying about anything but getting hits where I wanted and doing what I liked to do eventually led to me "reaching the next level" and being able to do it on a regular basis.
Until I was just past 30, it seems no matter what I tried I couldn't hit the proverbial bull in the butt shooting a revolver DA. So, I never tried it much. Just kept shooting SA and enjoying it.
Then, one day, just for "spits & giggles" I DA shot my steel plate (about 30yds) and hit. Second shot hit. So did 3 others. Next cylinder I was actually trying a bit more and ran 6x6.
This was slow fire, and it helped teach me the wisdom of the masters who say "make haste, slowly".
Practice matters, PROPER practice helps more than poor practice.
Forget internet claims of teeny tiny groups. Consider what YOU have and are using. 5 shots from a .45 in one ragged hole can be a 2.5" group.
you want a .25" group at 25yds? I might be able to do that. Rested from a bench, shooting a scoped bolt action XP-100 in .221Fireball. Or maybe using a scoped T/C Contender in .222REM or something like that.
Shooting that size group from any conventional service pistol class gun? Not happening in the real world.
If you're looking to train for competition, spending time and money on COMPETENT professional training might be the best way to go.
If you're just looking to get better, try picking one gun, one load and one type of shooting exercise that you enjoy and do that, over and over until you can do it flawlessly without having to "work" at it. Get to that point, and I think you'll see an improvement in everything else you try to do with a handgun.
and don't expect it to happen overnight. Like some other things, it can take years of practice to become an "overnight success". Some folks have a natural gift for some things. Others don't, but can learn with time and practice.
Just out of curiosity, what handguns do you have and enjoy? I've got pistols ranging from .22LR to .45-70. Each one is different, and some I have greater skill with than others, but I can shoot all of them to my satisfaction, and in the end, isn't that what really matters??