I learned about the Salmonella thing from Alton Brown, in fact he is why I have chickens in the first place. I watched a 'Good Eats' episode about eggs and he explained how it was better for you to eat non store bought eggs (never went in to much into pasture raised), how you are more likely to get Salmonella from them and how badly the chickens at processing facilities are treated. If it wasn't for that episode I might never have started doing research or tasted my first pasture raised egg.
I don't think the last video posted was the correct one about how badly chickens are treated in the processing facilities. This one is mainly about cooking them.