How to adjust the chain for Chamberlain, LiftMaster, or Sears Craftsman Garage Door Opener

I ended up having to do this on my opener and figured it would be an excellent video topic to upload. If anyone has any additional questions, let me know. Also let me know of any corrections or if I missed anything.
Today's Shoutout goes to Garage Door Fan 52
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Stay healthy
-TBHD724