Whilst this may not be your problem, I found that the YouTube clips always showed the SDK looking different to mine. I watched a few several times over and always came to grief. So I looked at the dates and got this one dated from 2 months ago;
Difference this time. I have made a working airport from scratch that never existed before and an over the top airport on one that pre existed and I wanted it improving. All I did was watch, pause, write notes, watch, pause, write notes until the end of the clip. Only then did I go attempt an airport of my own. Stacking all the tabbed windows as one on the right is what made it easier to follow.