On most Macs you can use about 15 fps. This is the ratio of picture width to height. This was used because it was an existing standard for movies before 1953. In fact films in cinemascope use an IAR of 2.35. Our work with the Media 100 will use standard NTSC 1.33.
Video files are huge.
We'd eat up any conceivable disk capacity in a very short period. Because of this we compress files. In fact JPEG is one common codec that gets applied to video if each frame is JPEG compressed. JPEG uses redundancy in the graphic to produce a smaller file. It is so-so as a video codec.