: The .7z extension indicates the file has been compressed using 7-Zip to reduce the storage size of the video clips for easier sharing or downloading from repositories like NASA ADS or academic dataset hosts. Common Applications Researchers use these files to:
: Extracting spatial and temporal features to understand motion. 113.mpg.7z
Photoelectric radial velocities, Paper IV. 528 7m - NASA ADS 113.mpg.7z