Sorry to resurrect an old thread but I had written the below response but totally forgot to post it so I felt it was necessary for anyone interested in the future.
I gotta say, wiring it is a piece of cake. Shooting the video took wayyyy longer.
Even the operation couldn't be easier. I was glad to pay the extra few bucks for this digital one over anything analog. I paid a touch under $50 bucks (shipped) for mine from a reputable seller on ebay. Got it super fast and grabbed the 10ft extension from Harbor Freight for $6.50.
You will additionally need a wire nut (preferred) or electrical tape for this job not mentioned in the beginning of the video.
The only thing I would've added had I found one (made the time to find one) was a 1/2" NM/SE (non-metalic/service entrance) connector sometimes known as a squeeze connector or Romex connector typically made by Gampak or Halex. This goes in the conduit knockout in the bottom of the Ranco controller and clamps down on the cable to eliminate cable stress on the teriminal blocks and eliminating the possibility that the cables can pull out of the terminal blocks. I had my friend float some hot glue in my conduit knockout after it all was wired instead.
Tips: Don't use any larger gauge cable than 14 (larger cable = lower number) or it won't fit in the terminal blocks. I used 14 but 16 gauge is probably your best bet here as long as your extension cord isn't too long. Try not to leave as much copper showing as I initially did. I ended up going back and trimming the wire and made sure it was pushed as far as possible into the terminal block. If you're handy with a soldering iron, it would also be wise to tin the wires.