That works great if I'm looking for an official video from the Wall Street Journal, but not if I'm watching Fred's Blog Channel. Also, what if I want to edit s

That works great if I'm looking for an official video from the Wall Street Journal, but not if I'm watching Fred's Blog Channel. Also, what if I want to edit something? What if I want to tweak the color profile? Add an effect? And as pointed out by another comment, you'd get a modified camera and feed it into the sensor, or modify the firmware. And some guy in China will do a clean-room RE and make little video signers. The bottom line is it's a cool idea, but I don't think it will work, and I don't think it will stop fake anything. Also, most of us complain about code signing when it affects us; why would this be different? Fred the Blogger can't get an "official video signing certificate", which is probably what we would end up with. Or better yet, get the government involved and create a Bureau of Trustworthy Video Sources!