The presentation of the evidence is made in a short video to present to the judge/Jury, the elements finded during the investigation and, particularly,in the crime scene, making reference to the corresponding pages.
Its purpose is to facilitate the presentation of the elements of evidence in the file, which allows it's better and faster apprehension by the judge / jury. The advantage is that it helps to avoid forgetting important elements or disordered exposures, since the video is made to achieve orderly and organized development that mantains the coherence needed to present the case.
Also, it facilitates the comprehension of the judge, by allowing him to relate the sayings of the attorney with the precise evidence to which the he wishes to refer.