The entire premise of course is ludicrous. A sound man or whatever he was would never leave his post and have a stranger working with expensive equipment, possibly ruining it. The writers definitely suspend disbelief so many times here.
I agree that Victor should have confronted Kristen but that would have taken away the dramatic effect as he wanted Brady to see the real Kristen and he did try and get him to view it but Brady was too busy and had to get to the church.
The fallout from this will be immense with Marlena seen as horrible just like Victor and Eric will be going through a crisis of faith like never before.
Still it was fun to watch the shocked looks on the churchgoers and how Kristen tried to spin this like it was a fake, while EJ who knew the truth realized the complexity of the situation.
Still great acting and expressions all the way around. November sweeps brings out the best in everyone and the plot as contrived as it may have seemed.