The moon is always a full-moon, as seen from different angles....
Here are all the major moon phases below :
Notice that the moon is always a full moon (lit on one side).
It is always lit by the SUN.
The shadow on the moon seems to change shape, but that is only in respect to the angle of the observer.
That is the basic principle of the moon phases.... And that is what is happening on the video on the first page......
The angle of observation slowly changes each day.