Motion JPEG.
JPEG is only for still images. Nonetheless, you will frequently
see references to "motion JPEG" or "M-JPEG" for video. There is no such standard.
Various vendors have applied JPEG to individual frames of a video sequence, and
have called the result "M-JPEG". Unfortunately, in the absence of any recognized
standard, they've each done it differently. The resulting files are usually not
compatible across different vendors. [1]>