I think we need a state-by-state constitution amendment drive to affirm it a protected civil right to record anything you can see or hear in a public space or on your own property where there is no expectation of privacy. When you apply some of these "video taping prosecution" theories to other situations, you run into some serious logical inconsistancies.
For example, if you have a security camera continuously recording on your property and it captures a police officer making an arrest, does that make you a criminal? According to some prosecutor's legal theories, it does! Does erasing the recording "cure" that? (Even though that would technically constitute destruction of evidence!) Since you did not willfully make that recording, would it be legal to keep it? Or would mere possession of such a recording be illegal?
All preposterous ideas, because they are based on the preposterous idea that it is illegal to make such a recording to begin with.