Likely an X-47B. No question about it. Sure, no military because they want less distraction. In another word, if you have military, they will draw more attention and already did. Remember the Government can goof up sometimes. Likely a prototype version of X-47B-related type of aircraft. Was it on way to Area 51 or the New Area 51 (52) in Utah? Could be. OR that craft is a dummy to throw you off of the real deal that was shipped overnight somewhere. I discovered a few problems with this craft seen on youtube. First of all, you can see the tires. So, it is not a UFO. Easy to figure that out. Second of all, same area, the doors seem not have any closures for the tires. No tire doors. Just the design you can see goes down to the tires. Clearly no aircrafts can be allowed to have that cartoonish suspension. If they attempt to fly that with the fixed doors to the tires, they will crash for sure. This is a fake. Third, one of the photo shows a break in the picture like it was a very poor photoshop on it. Clearly the pictures you see are photoshopped. A hoax. How I know it, look at the 2D side view of the craft on the truck flatbed and you will see a pipe like horizonally and see the back tire location. it looks like it was fixed poorly on photoshop. Likely it was a large object that is not a UFO or X-47B. It was something else and it was easy to fix as a craft. My opinion.