The identifier is also used by niche creators for cataloging:
A Facebook-based vendor uses 2961.mp4 as a reference code for short product showcase videos featuring items like bridal bouquets and accessories. 2961mp4
In various web directories and IPTV (Internet Protocol Television) lists, 2961.mp4 serves as a numerical index for specific movies: The identifier is also used by niche creators
If so, please provide more context about where you saw the name so I can find the specific "write-up" you need. [gem.cbc.ca] Some episodes have broken audio formats #11547 2961mp4