First Case:
Time: October 3, 1998 (The third day of China's National Day holiday)
Location: Somewhere on the hillside of the cemetery behind Qiongzhu Temple, Kunming, Yunnan
Overview: A railway worker named Han Jianwei was visiting family graves when, between 11:50 AM and 12:00 PM, he spotted an unusually bright point of light in the direction of the city center.and reappeared to the right of its previous position shortly after disappearing. He later observed the light split into nine diamond-shaped UFOs clustered together. Due to promotion by civilian UFO organizations at the time, this incident became one of the most well-known UFO cases in China.
YouTube Link:

Source: https://www.youtube.com/watch?v=fs97LD41pB4

CCTV Video（Starting at13′33″）:
https://tv.cctv.com/2010/12/24/VIDEAZXz3A7O6i2TuYL68M9W101224.shtml
In case of inaccessible video files:

From some of the scenes shown in the video, I suspect this is once again a reflection from a towering building in a distant city.（Starting at15′33″）

google map:
https://earth.google.com/web/@25.07...HhsQ3AgAToDCgEwQgIIAEoICJyejrUCEAE?authuser=0
baidumap: https://map.baidu.com/search/驼峰飞行纪念碑/@11425076.124999998,2867050.9699999886,18.83z/maptype=B_EARTH_MAP?querytype=s&da_src=shareurl&wd=驼峰飞行纪念碑&c=1&src=0&pn=0&sug=0&l=4&b=(-4138582.039999999,-2973099.25;27318697.96,11952724.75)&from=webmap&biz_forward={"scaler":1,"styles":"pl"}&device_ratio=1

Official Introduction to the Memorial Tower：
https://www.krzzjn.com/show-1054-73742.html

Drone perspective of the monument：
25 【 默石 | 小红书 - 你的生活兴趣社区】 IOoSaYa4t0YRhKF https://www.xiaohongshu.com/discove...webshare&xhsshare=pc_web&xsec_source=pc_share

google map:
https://earth.google.com/web/@25.05...HhsQ3AgAToDCgEwQgIIAEoICJyejrUCEAE?authuser=0

baidumap:
https://j.map.baidu.com/6e/ECnM

There is an iconic structure here built in 1997: the Mianshan Radio Signal Tower, though I haven't found any information regarding its specific height. Perhaps this could be helpful in identifying the light spot??

Based on some of the scenes shown in the video, I have roughly reconstructed its filming locations：
25°04'38.54"N 102°37'26.73"E

I want to know what means or methods can be used to determine the precise shooting position and the actual positions of those two light points?

Another similar case:
Location: Antuco Volcano Crater, Chile
Time: 2021 (I'm not sure if the subtitle translation refers to Chile's National Independence Day?)

Original video source:

Source: https://www.youtube.com/watch?v=CcYrK8GWpzU

As for the triangle behind the video, I believe it is nothing more than the result of a lens with a three-blade aperture magnifying an out-of-focus image, similar to the first case in Yunnan

It is not difficult to find the approximate filming location through the video footage; the young people are filming toward the valley to the west with their backs to the crater

https://earth.google.com/web/@-37.3...HhsQ3AgAToDCgEwQgIIAEoICNCMs8IBEAE?authuser=0

Similarly, I only found the approximate location of the light spot by comparing video frames, but there must be a significant margin of error. So, how can I determine the exact shooting location, and especially the precise position of that light spot (reflection)?