Burn bootloader to ATmega328p AU with Arduino NANO

Jump to the minute 3:40 if you're in a rush. :)

As I say in the video, during one of my project I had some trubles burning a bootloader to one ATmega328p AU microchips. The difference between AU and PU is their SMD or DIP formats. I found on internet how to burn the arduino bootloader using an Arduino UNO but after doing that my microcontroller wasn't working ok. It