Yeah, the steps are easy, but the devil is in the details. Things to watch for.
1. Steerer tube length. You have to cut the tube at least a few millimeters below where the bottom of your top cover is going to sit. They say a couple of millimeters below the top cover, but it really does depend on the depth of your top cover. If you don't have enough room under the top cover, you can't load the headset because the top cover will bottom out against the top of the compression plug. In the video, I seriously doubt he cut the tube short enough.
2. Compression plug slippage. This one killed me. I couldn't get the stock compression plug to stop slipping. The FSA plug works brilliantly.
3. Bearing stack height and crown race stack heights. This is where the micro spacers come in. There are so many different stack heights for the bearings and crown races, I don't know how it's possible to have an exact match for a frame.