I forgot when it was on (may have been during Sunday Footy show or The Roast), but I also remember a locker room clip with Joey in a suit talking to Mullen in his game gear just before a match. However, Uate was standing behind the two also in his game gear like he was ready to play. And it definitely wasn't a trial match as Channel 9 wouldn't have had cameras there, so it must have been during round 2 or 5 when Johns has injured.
Looks like Smith has made a habit of getting some of the fringe players in there to get a taste of first grade??