Perhaps I can get a serious answer here since I have yet had anyone explain to me the difference when I ask elsewhere (and rarely is it relevant to bring up here).
Why do we treat videos of murders different than videos of more prurient crimes? Why is it acceptable to host/download/share/watch a video of a murder as long as no sex crime takes place during it? Even videos devoid of any crime except being videotaped can be far more illegal and socially unacceptable than a video of a murder made by the murderer.
And I don't mean those watching it for political/reporting/policing/etc. reasons, but the ones who do so for entertainment.