Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media.
The term video advertising encompasses online display advertisements such as Mid-Page Units (MPUs) that have video within them, but it is generally accepted that it refers to advertising that occurs on Internet television. It is served before, during and/or after a video stream on the internet.
The advertising units used in this instance are pre-roll, mid-roll, and post-roll and all of these ad units are like the traditional spot advertising you see on television, although often they are “cut-down” to be a shorter version than their TV counterparts if they are run online.