Learn in the textbookHow Video Works and Its File Formats
DefinitionThe frame rate (フレームレート) is the number of frames a video shows per second, measured in fps (frames per second).
ExplanationAt 30 fps, for example, 30 frames go by each second, one about every 0.033 seconds. A higher value gives smoother motion, but the data size before compression grows as "data per frame × frame rate × seconds."
AnalogyIt is how many pages of a flip book you turn in one second. Turn more pages and the motion gets smoother, but you also have more pages to draw.
Memory hookIn fps, the f is frame and ps is per second. The unit itself spells out "frames per second."