Raspberry Pi Code - Password access to play a video and trigger a relay

Hi there! I am needing some code written for a simple Raspberry Pi application. I will have a monitor and a keyboard attached to the Raspberry but no mouse. I am hoping to have a program running asking for a password. (I will need the whole program to be locked so that you cannot escape from the program unless a specific code or password is entered.) For the main screen it will just say "ENTER PASSWORD" If you get the password incorrect, it states "ACCESS DENIED" and it loops back to the "ENTER PASSWORD" screen If you get the password correct, then it says "ACCESS GRANTED" and then a video loop starts playing and a normally open relay gets triggered from sending a signal to a GPIO pin. (I can send you the video file to play.) Once the video starts playing, I would like it to be locked in play mode and on repeat so that anything typed into the keyboard doesn't affect things or stop the video from playing. But additionally, I would also like to program a secret password that I will use to reset the game. When the code is entered into the system, the program will go back to the start - the "ENTER PASSWORD" screen. I have attached examples of the screen images but they are only to give an idea of what I am hoping for. If you think you can help me program this, I would love to hear from you!