The term video advertising could encompass online display adverts such as MPU’s 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 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.
Broadcast websites such as Youtube.com and MSNBC.com have such video advertising on their sites, as do newspaper websites such as NYtimes.