there is something about mary anaylsis

There's Somthing About Mary
Is the genre established? What is it?
The opening of the film starts of with a a man sitting in a tree singing a song whilst the other man who is also sat in the tree is playing the gutair. From this we assume the film to be a comdey film but due to the lyrics of the song he is siging we assume that the film shall be romanti genre too.
How is the genre established? What conventions are used?
 From the text cutting across the screen introducing the actors and the directors and the man siging in the background the font is pink and blubbly which shows that film shall be a comdey. The whole element that the man is in a tree and he is siging shows that there shall be some comdey and the lyrics being 'there's something about Mary'to match the title shows the romance. then the clip then cuts to ben stiller who we sterotype to be involved wiht a funny film.
What else does the audience find out from the first two minutes?
The film shall be funny due to the actors- Ben Stiller, Cameron Diaz and they are more well know character so maybe they shall be the main character within the film. Also actor Lee Evans is involved which helps give the conclusion it shall be funny. Also during the shot the man sitting and singing in the tree alot of people are walking past and they look like student. This clip is set in a busy area.
How does the audience find this out?
From the passing people we could think that it is set in a local park where there would be passing people people of set within the school ground. When the clip cuts to Ben Stiller and we see him from after just viewing the man in the tree singing we know that he must be the main character and the film shall be based around him life story within the him. Also from his appearance we know he isnt playing a character who is older- his own age, he is playing young charcter student maybe? But from the first two minutes we don't have any clue to who Mary is and we don't see her at all. The only hint we have is that Cameron Diaz is in the film and she is well known actress and usually more of a main charcter which could leave us with the idea she shall be playing Mary.