Here is my shot at the size of the plane, I assume the footage was taken with a modern smartphone sensor using the standard 1x field of view. There is very little populated area under the approach path to runway 26. I therefore worked on the basis of a 3-degree glide path, which gives the respective altitudes used in my calculations.
- Point 1 is located near the two towns of Anavra and Aetolofos, roughly 20 km from Larissa Air Base, directly under the approach path to runway 26. Because there is a lack of Street View imagery in the region that made it near impossible to pinpoint where the video was taken, I used villages lying roughly under the approach path as reference points. Based on the pixel measurement, the estimated object size comes out to be around 24 meters at 1000 meters altitude, which results in a smaller wingspan than expected.
- Point 2 is located closer to the coastline, at approximately 33 km from the base. The aircraft was on approach from the west. Under the same assumptions, the estimated object size comes out to be around 40 meters at 1700 meters altitiude, which makes the object appear very large.
This creates a problem in the analysis: at Point 1, the estimated span is smaller than expected, while at Point 2, farther out near the coast, the estimated size becomes unusually large... *Terrain elevation differences were taken into account in the calculations. (~100m)
