The snake looks very long in the video, but it's hard to judge how long it really is, because it's in the foreground with the small bus behind. That makes it look a lot longer than it probably is. It appears to be a Western Diamondback. The largest recorded Western Diamondback is about 7 feet and I doubt this snake is longer than that. Regardless, it's still a big one.
You didn't notice it crawed over something on the bus?
