So I bought the yyf shutter and they gave me a password and username to see the tutorial video but it just goes back to the login screen when I try to use the password and username. Anyone else have this problem or a solution? Just in case this helps I tried it on my LG G2 phone.
Give it a try on the computer first and then see if it works.
Thanks it works on the computer 
haven’t been on my computer in months lol