I feel like if you know the song being played (which could also be automatically identified with an algorithm like shazam's) it would be pretty easy to generate

I feel like if you know the song being played (which could also be automatically identified with an algorithm like shazam's) it would be pretty easy to generate an inverse waveform to remove it from a video's audio. It wouldn't be perfect, obviously, but it should screw up the song enough to not set off the copyright filter while leaving the conversation intelligible. On a more general note, respect for the law requires respectable laws. Short sighted laws meant to benefit some special interests implemented without clear and effective safeguards are a would-be tyrant's wet dream. How fortunate we are that these officers blew their load trying to shut down some random guy's interview rather than saving this hack for a special occasion like suppressing a major protest or worse. Imagine the danger of someone more ambitious manipulating the system in analogous ways but on a much larger scale. Who knows what sorts of law-hacks the next wannabe despot is already sitting on? Constant vigilance is the only defense.