Cannot be a plane. Look at the many (hundreds of) videos of "ISS lunar/solar transit"; these events are predicted well in advance, for specific locations. It's not photographers looking up to the sky at random times.
The only way this could occur with this degree of precision is for the object to be an orbital spacecraft, unfettered by considerations of weather, atmospherics, fuelling, piloting/remote control, maintenance, and all the rest. An object with a consistent, predictable orbit, the path of which is known in advance.
Planes cannot do this.