Skins don´t change

All the skins i put dont work only steve

What I expected to happen was...:
I try to put my own skins or other default skins in a server

What actually happened was...:
but whrn i enter only can see steve skin

video: https://drive.google.com/file/d/1J6AZzNPZzBM2-NHZ4HX03SfnPuxg16CO/view?usp=sharing