And the fact that they showed it to multiple members of Bryer's family indicates that it wasn't just about the next of kin thing. Also, it's pretty obvious that the other members of Bryer's family didn't have to sign an NDA, because the information was leaked about the goodbye video within days.
Which members of Bryer's family saw the video? We know his mother and AS have seen the clip, but who else?
A lot of people have assumed Bryer's dad leaked the information about the goodbye video, but that actually makes zero sense. He is specifically legally forbidden from contacting the other members of Bryer's family. If he didn't know already about what was on the video or where Bryer's remains were, then it's clear that he was never in contact with them. He likely found out from the media like everyone else.
To be fair having a no contact order hasn't stopped AS before, he has a ten year history of violating such orders. It's just too coincidental that less than a day after AS sees the video, the media suddenly reports that "two sources" close to the investigation claim that the suspects made multiple videos imo. Also, in the initial report about the goodbye video, it was said that a "family member who hadn't seen the video" leaked the info to the media.