P: Doesn't import GPS coordinates from MP4 videos

LR doesn't import GPS coordinates stored in QuickTime:GPSCoordinates in MP4 videos (.mp4), though it does for Quicktime videos (.mov). To reproduce:

1. Import the .mp4 and .mov files in this folder:

https://www.dropbox.com/s/6hga1ka2tm61v0o/mp4-gps-bug.2021.02.25.zip?dl=0

2. Observe that the .mov shows GPS coordinates in the Metadata panel, while the .mp4 does not.

3. Use Exiftool to see that the files have identical QuickTime:GPSCoordinates:

$ exiftool -quicktime:gpscoordinates mp4-gps-bug.MP4 

GPS Coordinates                 : 34 deg 0' 0.00" N, 38 deg 0' 0.00" W, 0 m Above Sea Level

$ exiftool -quicktime:gpscoordinates mp4-gps-bug.mov 

GPS Coordinates                 : 34 deg 0' 0.00" N, 38 deg 0' 0.00" W, 0 m Above Sea Level

Tested on LR 10.1.1 / Mac OS 10.15.7.