Film Trailer Research

Here is research into film trailers. What is here is mainly conventions and the stuff inside is mainly for something to refer to when planning my own. There are many different patterns I have seen within the trailers, yet some things are varied throughout. The things that stayed the same are the ways in which characters are represented, they are all blunt and all have roles, whereas things that change are things such as lighting, sound, etc. So, there's not much to be gained from highlighting these things, as it's all to think about when I begin planning.
Apart from that, there isn't much to be said for the research, I found what I expected to find and what I've found will be easily interpreted to help create my own trailer.