Videos they already knew where to find:

> The “brother site” previously hosted video of the mass shooting at a supermarket in Buffalo, New York, in May that left 10 people dead, according to an archive of the page that was viewed by NBC News. Links to the site were quickly shared on the extremist sites 4chan and 8kun (formerly 8chan) in the days after the shooting, where the site and video were discussed.

So a site hosts that garbage and it just gets taken down? They don’t find the host? Well then.