I can see how he is using it (and that is the same video), but what I'm saying is that he gives a false impression of "how easy it is".
Example: Here we see him use punch and roll to make a correction:
https://youtu.be/kY40lbIyuhs?t=4m30sWe can see from the waveform that there is a gap between the last word of the first take, and the first word of this take, and from that we can make an intelligent guess that when played back it is not going to sound like a smooth transition. The video hides that from us because
nowhere in that video does he play back a transition.
The answer is buried in two little snippets which I can't be bothered to locate, but if you watch the whole video you will probably spot them:
The first is when he says something like: "by the time you've recorded your 5th book". OK, so he's not talking about something that we will pick up in 5 minutes. He's talking about hundreds of hours experience with the software.
The second is when he mentions layers. Layers are terrific, and this is the feature that allows the transitions to be carefully edited in post production to produce seamless transitions. This is not shown in the video.
I've already added your "vote" for punch and roll, but I'd suggest that you look for a demonstration of using layers - it is similar to using multiple tracks in Audacity, except that the tracks are "stacked" in one visible track. I'm expecting that you will also want to vote for "layers" in Audacity because either layers or multiple tracks (or "virtual tracks" or some other equivalent) are essential for high quality transitions when using punch recording.