Computer Science for IGCSE & O level - Data Representation (Section 17 - No. 45)
Which of the following factors typically has the MOST significant effect on the size of a video file?
The video's aspect ratio.
The compression codec used.
The number of audio channels.
The video's title.
Explication
The compression codec is the method used to compress the information, and has a high impact on the file size.