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]>