What are the files? Most every recording device that records digital video will have a folder hiearachy along with a set of files; even for just a single clip.
What software are you using to import the video? Typically the software knows how to find the individual files that make up the clips.
That value is effectively 2 GB. It sounds like the card is thus formatted in FAT32 where files will either have a maximum file size of 2 or 4 GB. If formatted in exFAT, files can then be larger than 4 GB.