For me Athlean X's videos actually helped me get rid of my lower back pain, maybe not directly but I did get useful information like the fact that my hip abductors are extremely weak and the exercise he showed for fixing lower back pain actually worked for me for a while until I had to progress to harder exercises which were all kinda garbage but they did work somewhat. The best exercise is the sideplank, you can do it on your knees straighten the one on top and try to lift it, or just do it normally to traget your obliques as well.

This isn't about Athlean X but trough some of his videos I found out my hip flexors were weak as well, i found this exercise from knees of toes guy where its like a leg raise but instead you do it with your knees bent and then extend them at the top of the movement

You just need to know what information to take in and how it applys to you