Background After a phone change, I ended up with files with the same filename (except file type) residing in the same image folder (JPG + HEIC/MOV)
On import of all files into LR, I saw that the order of the files was totally wrong (when sorting on capture time) Some files were months off and with 500+ images in just one import
Spent a great deal of time debugging this and found that LR seem to add/overwrite metadata in .MOV files (which by default is lacking many fields usually present in images) IF on import, there exists a JPG with the same filename in the folder. If so, much of the metadata from the .JPG is copied to the .MOV file!? Doing an import w/o the JPG present, no fields are touched in the .MOV
Wrt to create time, which triggered the issue I saw, I can see no good reason for LR not to read the file system's FILE MODIFICATION DATE/TIME on the .MOVs, which in this case was correct.
Why should you take the metadata from some other file?