Cleaning and Upgrading my ASUS TUF FX504 laptop

One of my laptop's fans wasn't working so I decided to open it up and clean it. I took this opportunity to install an additional 8GB DDR4 RAM too. You can put your questions in the comments section and I will try to answer whatever I know. Also, a few people told me to disconnect the battery. I didn't do this in the video but please be sure to do it. The songs used in the video are not mine. I have added the links to the songs 1) Tobu - Hope (   • Tobu - Hope (Original Mix)  ) 2) Ambassadeurs – Tyrrhena Patera (   • Ambassadeurs – Tyrrhena Patera  ) 3) Fredji - Happy Life (   • Fredji - Happy Life (Vlog No Copyright Music)  )