It's been a thing since the Arma days "I GOT THAT ON MY GO PRO BUDDY, SEE YOU ON THE FORUMS"
Piss poor RP, but it is what it is, happy daily. Just try to play along with it in RP "I don't see a bodycam on you". Turn it into an RP scenario if they're gonna play at that game.
If it is in fact to do with a report / rulebreak. Then they have no need to say anything about a bodycam, as reports are OOC issues. And we will never deny a report because the recording wasn't gained via an RP scenario (Sorry, this report has enough evidence, however I can see you aren't wearing a go pro on your head, denied.)