Then you are no longer a bystander and may continue to film. The irony with this bill is that it would be illegal to closely film the police as a bystander, but if you are arrested/detained for doing so you may film the police detaining you.
Only if you stop and then re-start the video clip. Otherwise, it's the same clip that started while illegal rendering the entire clip illegal. Or some such lawyerly BS to get the cops to be the victim.
