R_25_ev.mp4 -

Identifies the file as an MP4 and lists compatible brands.

All H.264 encoded videos just can be played at 25 fps - TI E2E r_25_ev.mp4

The "r_25" likely indicates a 25fps frame rate, and "ev" may refer to "event" or "exposure value," often found in automated recording systems like security cameras or automotive sensors. Container Structure Identifies the file as an MP4 and lists compatible brands