I'll agree with the consensus so far and say this story didn't entirely work for me. I really enjoyed the narrative and was curious to see it going, until the abrupt POV shift to the aliens and the ensuing As You Know, Bob conversation up on the space ship. At that point I felt like a joke had been played on me, the reader, instead of within the story itself. I think "shaggy dog story" sums it up pretty well, as Adrianh put it, and unfortunately I've already read this particular kind of punchline many times in the past, and this version didn't really distinguish itself from the herd for me.
I also didn't find the aliens particularly alien. They seem to have some cosmetically different biology, but doing sick things on camera for the laughs is a very human motivation. Just jump on over to Youtube for all the evidence you need. I think there's some room for some commentary on dark humor gone too far, but then I think I'd have liked it better if that motivation were pinned on humans instead of aliens. It would be interesting to see this type of story told with the aliens and humans reversed.