143mkv

Mara's first thought was of junk—downloads mislabeled by sleepy fingers at dawn, or movies renamed to slip past firewalls. Her second thought, more stubborn, asked why a file would announce itself. She clicked pause and the image froze: a sequence of digits superimposed over a seaside horizon—1, 4, 3—each contained in a shell, and the shells lined up like little counting boxes.

It is critical to state outright:

: It could simply be a name given to a digital video file, possibly indicating that it is the 143rd file in a collection or sequence of MKV files. 143mkv