How to interpret filenames?
The filenames have what is clearly the date
%m%d%y, but it is followed by 9 digits that I do not know how to interpret. It would be convenient if that told me the exact second of capture -- but the numbers do not seem to work out. What are those 9 digits?
I know I can get the creation time from exif, but I am also curious.
1st, April, 2021
File name format as：210401_155432123.mp4