The top comment on the second video makes a good point: "0:26 to 0:34 is the exact same noise as the one from 0:51 to 0:59 in the Conklin video, right down to the bird noise at the end. It's just been cleaned up."
Viral marketing, indeed, but seems likely it is for the new Mass Effect 3 video game... skip to 2:15 for the sound designer interview: http://www.youtube.com/watch?v=8bytxqeUMPU
http://www.youtube.com/watch?v=8bytxqeUMPU