i heard it is possible to still do it but i dont know how can someone tell me how to do it or upload a video and give me link

Yes, the glitch still works with Stranglehold after NXE.

Just follow these instructions. You will do the glitch during the loading sequence for any level. So from the main menu, load a game, and as it is loading do the guide glitch.

And I know it works because I did it a few months back to get the normal, hard, hard boiled achievements.

Note: You will want to have EVERYTHING done before you do it, cause they will pop out of order. I tested it on a dummy profile first and noticed this. So do everything on casual, then pop the last 3 difficulties with the SPG.

It also has about 300 online kills on it so you only need 8 more for the online achievement