I shoot sports... and it's super useful to RATE SHOTS IN THE CAMERA using the "rating" button on the back (a very small % of shots are keepers).
Photos work perfectly ... but when video comes into Lightroom the stars aren't preserved at all-- they are just dropped. In the LR classic forum, JohnRellis investigated and found:
the sample video from EOS R6 and another from the Canon EOS R50 (released last year), both use the industry-standard metadata field Quicktime:Rating to store ratings, whereas LR reads ratings from EXIF:Rating and XMP:Rating.
REQUEST: please add support for import of Quicktime:Rating for all us Canon shooters taking video!
thx