Understanding the difference between a trailer and an opening sequence

A trailer will have to include:


0 The best parts of the film
0 Fast paced editing
0 An idea of a story and genre, without spoilers
0 Interests an audience/ makes them want to see the film
0 Show any big named actors
0 A voice over telling us about the film
0 A website for more information (not a necessity)
0 Fast paced or relevant music





-------------------------------------------------------------------------------------------------





An opening scene will need to:
0 Set the mood and scene
0 Introduce the characters or ideas
0 Give us some names of the actors/directors/ crew involved
0 An idea of the plot to follow
0 Establish viewers intrigue
0 Uses titles and font to set a mood





-------------------------------------------------------------------------------------------------

I choose the title scene to 'A Series Of Unfortunate Events' as my second example due to its creative nature and use of a re-occurring motive of the eye. This motive relates to the movie and plays an important role in the film, so making it present in the opening is a good idea.