The Alma Center, which focuses on events along the northern border and beyond, says that Hezbollah's drone video showing the Haifa area, including sensitive sites, was probably stitched together from multiple drone shots rather than being one single drone flight.
According to Alma Center analyst Boaz Shapira, there are subtle changes in shadowing in the different pictures taken of different sites within the Haifa area, suggesting the flight taking place at very different times of the day.
Some of the pictures may indeed have been taken weeks before, due to the absence of greenery in a number of pictures.
Shapira considers it highly unlikely that Israel's advanced aerial defense system would not detect a drone hovering in the north for that long, and it is more likely that the drone or drones took the pictures over the course of several weeks, from April to June.
As to the identity of the drone, there are a number of Iranian-made drones such as the Shahed-1 or Hudhud-1, though knowledge of these drones' capabilities is limited.