lol yeah well hey, that was just suggestions

you're not forced to agree with all that I said obviously...
but that's what I am convinced to be the best way to do anyway.
about your question...
the "depth" of the explanations isn't the most important thing, what is the important thing is that the guy watching your clip must be assured that there is an explanation to everything... don't go too in depth, but talk about everything quickly. No need to give away all your mapping secrets before even being hired

Have the guy realize that you DID plan all the details and then he'll feel the need to find out more about them - then he'll want to see you in person again
