One large video that has evidence to convict anyone who did criminal activity is fine. How much there is isn’t the point; it’s getting the facts and prosecuting based on those facts. But it is a lot more than one video and one victim.

That we don’t know many of the criminals yet but know a huge amount of the victims, shows the cover-up. And common people don’t usually get their crimes covered up, so the set of likely criminals gets much smaller.