I found one news report which says that, but doesn’t quote anyone:
The owner told KXAN the flyby was part of a marketing video and said the pilots flew lower than expected.
The article quotes another Jetran public statement that explains the flight to begin with:
JetRan said the aircraft was undergoing a final pre-delivery test flight before its planned entry into the Qatar Airways Cargo fleet.
So, a final check-flight after taking delivery from the cargo conversion, and a marketing video opportunity. But:
We are aware of a video circulating on social media showing a freighter aircraft conducting a low-pass flight in a manner that does not reflect operational standards
They are rather disappointed in their pilot, apparently.