This video is an introduction to the pic16f84a microcontroller for my students taking GCE A level electronics. It runs though some important details that can be gleaned from the official datasheet for the microcontroller and PICKIT 3 programmer.
It's not the most exciting video but there's definitely some useful information to be had. You may wish to refer to the presentation that can be found here:
https://docs.google.com/presentation/d/14wftaWb857xsqxhkHHVHCoC17yPC5feb7SHq9hJdAsU/edit?usp=sharing
