Granted, the first group produced their own video, but the spin difference is remarkable.

Without the audio, side by side, the urban farming group seem to be doing many of the same things as the first family in the preppers story.

Here are the other parts to the preppers piece:
part 2 -- http://www.youtube.com/watch?v=gLX-Remh7Aw
part 3 -- http://www.youtube.com/watch?v=NpGFHOqIi5A
part 4 -- http://www.youtube.com/watch?v=qPlhocjYtOw

With the audio, my impression was that the preppers piece was all but saying outright "these folks are (slightly) nuts".
The word "extreme" was used a few times.

Also their unseen, unheard "expert" had criticism of every plan, but never offered a whole plan made of his own ... expertise.

Maybe they'd rather you sit and do nothing? -- because we already know what happens to people who try to take care of themselves.
http://www.youtube.com/watch?v=-taU9d26wT4 It's 8 mins, but you'll only need about 90 seconds.