Encrypted data in Youtube videos

I just had this idea because I have a friend that works with stegonagraphy. In my past post, I told you how youtube has this video/audio fingerprint technology that recognizes copyright content. Obviously one way people have been getting around that is by introducing enough noise in the audio/video to pass the threshold of detection but still good enough to be enjoyed as audio/video. This is a classic stegonagraphy question, how much other data can you embed in media and still have it be undetected. So what if the embedded noise introduced in Youtube videos is actually encrypted data, because afterall, encrypted data will look like random bits (that's the point of encryption). Basically, all you will need is a shared symmetric key and AES or some other symmetric encryption. I wonder if anyone is currently doing that. I'm sure other people have thought of this (and probably have not blogged it though, well you can probably guess why they have not blogged it). Back to reading.