Code for AIDA64 External Display (Arduino) not working

I have copied (as best as I can), a project from a youtube video, where it adapts a protocol used by a display compatible with AIDA64 and converts it to instructions from my LCD.

There is no source provided in the video, but I unfortunately can’t figure out why my code isn’t working.

My Code –

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <Arduino.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void blink(){
  digitalWrite(2, HIGH);
  digitalWrite(2, LOW);
}

void setup()
{
  lcd.init();                      // initialize the lcd 
  lcd.backlight();
  Serial.begin(9600);

  lcd.print("Ready>");
}

void loop()
{

  if (Serial.available()){
    //Serial.println(Serial.read());
    uint8_t c = Serial.read();

    if (c == 0xFE){
      while (Serial.available() == 0) {}
      uint8_t c2 = Serial.read();
      switch (c2) {
        case 0x47: // Set Cursor Pos
        {
          while (Serial.available() < 2) {}
          uint8_t c3 = Serial.read();
          uint8_t c4 = Serial.read();
          
          lcd.setCursor(c3, c4);
          break;
        }

        case 0x48: // Set Cursor Home
        {
          lcd.setCursor(0,0);
          break;
        }

        case 0x58: // Clear LCD
        {
          lcd.clear();
          break;
        }

        default:
        {
          lcd.print(c);
          lcd.print(c2);
          break;
        }
      }
    }
  }
}

Source youtube video – https://www.youtube.com/watch?v=Djeir8s-YMc

Hoping someone else might be able to help,

Cheers.

I have tried looking over the code, comparing to the video and trying to find more information, which I cannot unfortunatley