2961mp4 -

The identifier is also used by niche creators for cataloging:

Stored under the identifier turner_video_2961 on the Internet Archive , specifically as a trailer or preview file. 3. Retail & Social Media 2961mp4

It is a specific bitrate/resolution identifier (1280x720 at 2961k) used by streaming services like CBC Gem . The identifier is also used by niche creators