What's the reason for keeping the footage out of the public's hands? "Proprietary NFL coaching information" doesn't really explain it. Are the NFL making money off the teams by cutting them a special deal of All-22 footage of their own games, and opponents?
What's the reason for keeping the footage out of the public's hands? Couldn't it be as simple as wanting to preserve some value for the fans who actually buy tickets? In any case, if this footage is so valuable, why can't somebody with a good camera phone buy a seat in the nosebleed section, set up a tripod, and charge for the stream?
They can but they'd get sued.