Thank you for the explanation, and for sharing your knowledge about the sky, camera types and settings. I tried to take a closer look at the situation following your suggestion of Crepuscular Rays.Spontaneously I would say Crepuscular Rays
A phenomena you occasionally can observe at sunset or sunrise (often when the sun already has set/ or not risen yet), but due to geography (distant mountains) or (most often) caused by distant towering thunderstorm clouds, these optical phenomenas appear. Often pretty, kind of spectacular and unusual.
We learned that:
Below is a screenshot from ViaMichelin.frOn the night of October 1st Nguyen NT (living in Tinh Ky Commune, Quang Ngai City) posted a clip on his personal Facebook page with many pictures of a rather strange light streak appearing in the Quang Ngai sky in the afternoon of the day September 29th.
Knowing the place, I wanted to find out about the Sun. The app called LunaSolCal will give data about the Sun and the Moon. I tried to add Quang Ngai, but it was not in the database, then I tried Tam Ky, which is 60 km to the North, measured on a Yandex map. In the Yandex map, I can play with the ruler and learn that Tam Ky is the equivalent of 50 km straight north and 30 straight west of Quang Ngai. In the app, I can move back in time to September 29 and learn that in Tam Ky the Sun set at 17:36 Indochina Time. This means that in Quang Ngai the Sun would be setting close to the time of 17:30 since:
The difficulty with the possibility of the phenomenon being crepuscular rays is:According to Ms. T., the light trail was accidentally recorded by her around 5:30 pm on September 29th. The band is bright red like a shooting star, but it doesn't move.
The Sun sets in the west, but this appeared in the east. If the statement above is true, there is also a phenomenon called anticrepuscular rays:“A lot of people think that at that time the sun was setting, so there was an image like that. But the image I filmed appeared in the east so it couldn't be said that the sun had already set. The light strip appeared red at first, there was a bright red color. the tail was like a shooting star and then it melted very quickly "- recalls Mrs. T..
If anticrepuscular rays is a possibility, then one can look for images that look similar to what allegedly was recorded in Vietnam, at least if it was close to real. On | EarthSky there is one image that resembles: "Jenney Disimon in Sabah, North Borneo, caught these anticrepuscular rays and a rising moon – and posted them to EarthSky Facebook – on June 4, 2015."Anticrepuscular rays, or antisolar rays,[1] are meteorological optical phenomena similar to crepuscular rays, but appear opposite of the Sun in the sky. Anticrepuscular rays are essentially parallel, but appear to converge toward the antisolar point, the vanishing point, due to a visual illusion from linear perspective.[2][3]
Anticrepuscular rays are most frequently visible around sunrise or sunset. This is because the atmospheric light scattering that makes them visible (backscattering) is larger for low angles to the horizon than most other angles. Anticrepuscular rays are dimmer than crepuscular rays because backscattering is less than forward scattering.