It was; they used the middle of the sequence that I saw on KARE-11 TV. If you look at the start of that clip, the bridge is down, then they loop back to the start of the collapse. In the original, you could tell that the near side (out of the scene to the far right) of the bridge dropped first, then pulled the rest down and away from the far bank and king-posts.
That was my conclusion from the video as well. And then the next span over land on the far side pivoted away as the counterbalance from the overwater span disappeared.