Those files are low-resolution versions of the same video (thumbnails). This is mainly used by the mobile app whenever you\'re playing your videos back or when editing/uploading them, since the full-resolution files are giant and hard to work with or transfer wirelessly.
These files perform the same function as *.lrv and *.thm files on other cameras.
등록안내
These files perform the same function as *.lrv and *.thm files on other cameras.
https://forums.garmin.com/showthread.php?315529-glv-file-purpose
핸드폰이나 실시간 모니터링 등에 사용하는 저해상도 파일인듯합니다. 썸네일 생각하시면될듯