This video going viral is pretty cool even if it was just an elaborate Hollywood film promotional hoax. My initial feeling was that it could have been defense related rocket engine or fuel tank components being delivered somewhere. Such rocket components can be both dangerously volatile and toxic, hence the police and CHP escorts. Others have speculated that the large object on the flatbed truck was an industrial strength electrical transformer, which can also contain toxic chemicals.
Lastest speculation on the Net is that the flatbed truck was hauling one of the numerous missiles in the US arsenal, possibly a Trident. I would tend to agree with that speculation. And given the level of security shown in the video, if it was a missile, it certainly wasn't a nuclear armed missile. Bottom line is that if this was was an incident involving the transport of an armed US theater-level missile, or, the retrieval and transport of an unknown downed aerial object, then the general would public wouldn't have been allowed anywhere near the area. So, it probably wasn't any Big Deal.
And after all, it is the season of the witch. Either way, instant classic. To watch the video, click here.