A good tip from classical guitar is to only fret the strings that you need to voice the chord. Sometimes you'll realize that you only need 3 or 4 strings fretted to make the chord you need, so then you don't need to struggle to make sure all six strings are being cleanly fretted.
Some five decades ago my guitar teacher told me to stop trying to barre strings I am already fretting. For example with the G major you only have to barre the 6th, 2nd, and 1st strings with the index finger because the 3rd, 4th, and 5th strings are already fretted. I have very large hands, so I play a lot of barre chords with my thumb over the top of the neck. For the G major example; I barre the 6th string with my thumb, and the 2nd and 1st strings with my index finger.
Something pretty fundamental, thst you did without explaining, which helps wrist posture for barre chords is you switched to a left knee support position in sitting. Worth doing intentionally to help wrist hand posture and fretboard reach. Great video.
Do you think everyone can do the barree chord? I can press ass hard as i want against my guitar even so that i can only hold it for like a few seconds because it hurts so much and i can get every string enough against the guitar to make it sound well except for the h string it just doesnt work i feel like there is too much space at the spot of my finger where you can fold the finger
You can also wrap your thumb over the top. Another tip is, if you are right handed, your right arm should be anchored down to the guitar body. You can “lever” the guitar into your left hand barre chord. You don’t even need your thumb on the back of the neck. If you do have your thumb on the back, and you lever it into your hand, it makes it much easier.
I have to barre my index finger and then find the other fingers. Because if I do it the opposite way like you show then whenever I put my index finger down, my hand changes position and moves my other fingers too much.
https://www.thetalenthouse.net/guitar?video=ChkPuAZkUGo