Towing to fast results in roll over

So somebody is assuming this happened from too much speed. Look at the very beginning of the video. He was going straight across the bridge and it tipped to the left as he was just starting into a left turn. There is no way it took the whole distance across that bridge to tip over from the right turn before the bridge.
My opinion, not that it is worth any more the the original one, either high wind over the bridge or drifted to the right and hit the bridge throwing the right side up.