Pretty interesting video, but there are a couple of inherent issues - metallic and pearlcoat colours. Where solid colours can be made almost invisible, pearls and metallics will never look 100% without being sprayed. And as you know, that involves a much more elaborate process.
A similar and simpler process than in the video can be used. That would be to have the factory colour available and touch up the chip. Don't try to make do with a colour that's "close". Water sand with 2000 grit on a block very lightly to remove any high spots or overlap from the area that you applied the touch up colour to on the original finish. For a clearcoat replacement, use clear nail polish over the repaired area. Let this dry completely, watersand smooth again, then buff and polish. Solid colour repairs will be almost invisible and the pearl and metallic colours will still look better than the chipped finish.