Dave seems to have the gift of talking without much editing but for those who don't then editing is super-important. You may have to shoot 60 min of footage for a video that edits down to 5 min.
A typical video for me is maybe 50-100 clips.
I prefer to think of something to say and then record a clip of that. It just breaks up the flow and gives your subconscious time to think about what's next.
I usually know kinda what I want to talk about when I hit record, but I usually have no idea exactly what to say when I hit record, I just wing it. So maybe 10% of the time there will be a false start because I what came out didn't make sense. You can see see that on my timeline below, with a small pause on clip 42 for example.
Other golden rule is I shoot everything in sequence, even if I have to change my macro lens 10 times. Makes editing infinitely easier. You'll go nuts otherwise. So I just drag all my clips into the timeline, trim the smart and the end, and delete the occasional dumb clip and that's it.
Very little of my footage is wasted or edited out, almost all of it makes it in the final edit.