The answer to this is “nothing and a lot.”  Both a videographer and a cinematographer will come to your wedding and document your day.  Being more strict on the definition, a videographer will turn up and record everything that happens then hand over a video which is in time order.  It tells the story of your day, typically from one angle from the start until the end.A cinematographer will generally use multiple cameras to capture different angles.  The aim is to create a short film which tells a cinematic short story using a mixture of both sight and sound.  Typically the video will mix different key parts of your wedding day.  From the vows to the speeches and of course the all important bridal preparations.The fact the film is shorter actually makes it easier to tell the story.  The last thing you really want is a four hour epic video that makes your friends and family drip with cold sweat when you say “Hey…why don’t you come over to watch our wedding video?  It’s only four hours long!”I prefer to think of myself as a cinematographer since my emphasis and passion is on the creative side of film making rather than simply recording your wedding day from start to finish.