The "Alien Ship" of Apollo 20 is not the only artifact on the Moon. There are many. Several stills and videos can be downloaded from the NASA website showing this.
This particular video was produced from clips downloaded from NASA's Apollo 17 website. The main and secondary object in the video are not "rocks". They are ancient artifacts.
As can be seen, the videos were highly obfuscated by NASA prior to posting. They don't want you to see the details in the shadow.