While you were chasing shelf clouds in your backyard in Tennessee, these guys were cutting powerlines with hacksaws trying to get through south of Greensburg on May 4th (like David mentions). Lanny was also reporting live for KAKE in Wichita, pleading for people to take cover and mentioned that Greensburg was in the path of the tornado. I think if they thought anyone needed help in that youtube video, they would have stopped, some of those houses weren't damaged too badly from what I can tell.
Lanny was in Greensburg for a very long time that night, and it still affects him to this day. So for judging a 5 minute preview on youtube, I wouldn't assume they have no regard for human life, because I know just the exact opposite is true.
I have seen the highlights for the show on CourtTv, and from what I can tell, all of that footage is theirs, which is more than the other 2 shows currently airing can say.