Well, they could contact a news outlet on the condition of anonymity & the news outlet satisfies themselves as to the validity of the footage. Similar to how a

Well, they could contact a news outlet on the condition of anonymity & the news outlet satisfies themselves as to the validity of the footage. Similar to how anonymous 'tip-off' stories with protected sources work in general at the moment — the media outlet put their own reputation on the line on the basis of the source & we trust (to a certain degree) reputable news outlets to validate & vet their sources correctly. This is true for stuff that's easily forgable at the moment, e.g. a whistle-blower releasing documents.