Ok, so the headline is a bit clickbait-y. It’s not not everyone who ever watched the video that they are interested in, it’s one person they are trying to track down. Still concerning from a privacy standpoint, but it’s not like they are trying to say that watching the video was itself a crime.

Thats not the issue.

Its the same as when feds ask google for location data for everyone near a crime at a given timestamp. Its violating innocent peoples privacy in large swathes.

Google stopped giving location data recently. Hope they keep going.