Installing macOS Catalina on a mid-2012 MacBook Pro

THIS IS NOT A TUTORIAL! THIS IS JUST MY DOCUMENTATION OF MY EXPERIENCE!
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In this video, I restore a MacBook Pro that was given to me by a family friend. With the given situation of the MacBook, I had to do a clean install of Mountain Lion. Then I had to upgrade to Sierra in order to Upgrade to Catalina. In between upgrades, I take a look at the key changes that occured over the 3 versions.
Music:
Running Errands by TrackTribe
Two Moons by Bobby Richards
Island Dream by Chris Haugen
Rinse Repeat by DivKid
Catalina by Myself (Can upload track if requested)
Software I Use:
OS: ArcoLinuxS with KDE
Video Editor: Kdenlive
Image Editor: Gimp
Music Composition: Garageband