I carried out research on different camera shots and angles that I could use in my teaser trailer. I found these websites very useful and also found a SlideShare presentation which gave lots of information about additional things to consider when filming such as continuity. I hasten to add that I DID NOT MAKE THIS PRESENTATION, I merely used it for my research and to gain more knowledge in order to make my teaser trailer as good as it can be.
http://www.mediaknowall.com/camangles.html
http://solematesfilm.blogspot.co.uk/2011/01/research-camera-shots-angles-and.html