I guess he meant photo montage in video format.
I am using pinnacle studio plus to create video/photo montage.
A good software that's good for beginner, can do drag n drop n auto create movie
They use FCP. 4.9K for SDE, and 7.9K for full wedding album (SDE included) as I last know. And it is a lot of hardwork behind the scenes.
But really, it doesn't matter which editing software you use. Vegas, Premiere, etc can produce the same results too. Just master it well.
They are from Toronto, but they cover many weddings in the States.