Could you clarify if you are looking for a , an academic computer science paper , or historical mission data ?
If you are researching processor architectures, "MP4" often stands for a of the ARM Cortex-A17 CPU. This hardware was widely used in systems-on-a-chip (SoCs) like the Rockchip RK3288.
Taking Flight (ACM SIGGRAPH 2016 Computer Animation Festival). This paper includes "a17.mp4" as supplementary media.
You can find high-level specifications and architectural overviews in documentation like the Cortex-A17 Technical Reference Manual provided by ARM Developer .
"A17" is a standard shorthand for the moon mission. Researchers often analyze "A17 mp4" files (digitized versions of mission film) to study lunar geology or mission history.