The FourCC : CJPG is explained here. The CJPG ID means that the computer needs the codec is used by the Creative Video Blaster Webcam. Like most of the other files these codes files are old and rarely used.
FourCC : CJPG
The CJPG codec refers to the MJPEG codec used for compressing video. This was used in some models of the Creative Video Blaster Webcam. MJPEG is a motion JPEG format. This means that each frame of the video is compressed independently, allowing for high-quality video with low latency. See also the CHAM codec as well as the BW10 codec.