my custom minecraft skin does not show in game[and only shows the default alex skin] even though in the launcher and the official minecraft website it shows i have equipped a custom skin

there's not much to it, other than my custom skins literally do not show up in the actual game. I only recently bought this game, and I would really like to play with a custom skin 

 

the screenshots show the custom skin that i made, and how it is clearly in use on both the launcher and the official website, however as show in the video, i have the default skin applied. I have also linked the skin as well

thank you very much!  

_ccardinal