Programming a CreaCity 3 Button Universal Garage Door Opener

We have a Chamberlain model WD962KEV garage door opener and no remotes. I needed 3 remotes and decided to buy one Chamberlain brand remote in the event that I had problems I would be sure to have a high quality product with decent customer service. Model 953-EV. Cost was about $33 on Amazon.
https://www.youtube.com/watch?v=lPFhxJVn0kk
My intention was to buy 2 more aftermarket remotes. I chose a pair of CreaCity Universal remotes. Cost was about $14.33 for the pair, on Amazon.
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