I thought I could do it faster than in the video, but, no, I think it took me about 10 minutes. On our 2007, all of those connectors are really sticky - from age maybe. I broke a little piece off of one while trying to pry the two pieces apart. My advice on the connectors: wiggle back and forth and be very patient.
This worked for our 2009 Kia Rio. We needed to find the radio serial number. The unlock code is the last four digits, and add 1212 to that number. 1291 became 2503.
yes, you will need your code number if you unplug it. You can buy patch looms for a new radio. go to Autobarn or Repco for these. Ebay can be a bit less helpful.