What do we expect to see in the opening 2 minutes of a feature film?

Professional openings:

This opening is from the film- "Warm Bodies". This clip is four minutes long, but I am focusing on the first two minutes of the clip. In this opening scene, a small section of the plot is shown:
Firstly, we are introduced to the main character, who reveals that he is actually a zombie. He tells us that he doesn't remember his past and that nobody knows where the zombie outbreak came from. He gives quite a lot of information but most of it isn't really pertinent to the plot, it just 'sets the scene' for the movie.
We can see that there is one key character- 'R' who introduces himself.  We aren't introduced to any more key characters until later on in the movie, and R is presented as the main character.
Throughout the scene, the main character narrates his inner monologue. This is the only dialogue present, but it is very informative to the audience. This is where we get the majority of the information about the plot.
There is only one location present during this scene- the airport. The entire opening is filmed inside the airport. R does move around the airport, but the locations are quite similar and very typical of an airport setting.
During this section, there are not any opening credits. This suggests that the credits are all at the end of the film. This is quite effective in this case as there is a lot of information being portrayed, so it is helps to only have the dialogue to focus on. 

This is my second professional example. This is a short section form the beginning of the movie 'Deadpool'. In this example, we are not shown a lot of the plot of the movie. We see a costumed character, who we assume is the main character, several other people in various positions. Without watching the rest of the movie, we can only assume that the character in red is Deadpool and the other people are the 'bad guys'. Because of this assumption, we can see that there is one key character in the opening sequence- Deadpool. 
This scene has a happy song playing over the top of the action, which is also in slow motion. This adds to the satirical nature of the scene and it becomes increasingly obvious that this movie is funny and not at all serious. Also, as there is music playing over the action, there is no dialogue at all.
During the slow motion scene, we are only introduced to one location. This is a motorway from a city. We can assume that the film is located in an American city. We cannot be sure that the rest of the film is set in this location, but we can only assume that it is. The motorway seems ordinary, so we can also see that the story is based in a modern-day America. 
The credits happen throughout the opening scene. They appear over the action and also appear to be in slow motion. They are particularly humorous as they don't actually say the actors name. Instead, they are short, satirical lines that exaggerate the actor. An example of this is: "An overpaid tool". Although this doesn't actually tell the audience anything about the actors, it sets the tone for the film. They are sarcastic, which is a trait that is prominent throughout the entire film. This makes the credits link well with the rest of the movie, and they show the audience that the film is going to be funny and sarcastic. 

This is my final professional opening- this opening is from the film "Me and Earl and the dying girl". In this clip, not a lot of information is given away about the film. We are shown the main character, but are not told what the movie will actually be about. 

We are told that there is one main character in this movie. This character is named as "Greg", and he introduces the school and his situation. This is the only section of plot that we are told, and it doesn't go into much detail. 

There is a running dialogue throughout the scene. The main character speaks a monologue over the top of the scene. He continues for the whole scene and is the monologue is coupled with a few interactions between the character and other people. Although we are shown other characters, it is clear that Greg is the main character and that the film is set in his perspective. 

There is only one location in the opening- this is his High School. It becomes clear that this will be the main setting for the film, and although we see different areas of high school, it is clearly based within a few areas.

Student made openings:

This is my first student-made opening. It called 'Wanderlust' and is by a person called 'Liam White'. The piece is based upon this speech by a man called Alan Watts. This speech revolves around the idea that a person should do whatever they want, without worrying about the funding for their adventure. Alan Watts speaks about how people are not living how they want and are stuck in their lives, because they're worrying about the money involved. 
Wanderlust is based upon this speech and focuses on the idea of an adventure. This is the part of the plot that is released to the audience. The main character is seen leaving his house and is carrying a large bag. He writes a letter to his parents and we assume that he is saying goodbye to 'follow his dreams'. This is the plot of the opening and we assume that if the movie continued, we would be seeing how his adventure panned out and if he succeeded in his attempts to 'run away'. 
There is only one character throughout the whole piece and we assume he is the main character. He is a teenage boy who is running away from home to live a new life. 
There is only the speech by Alan Watts running over the top of the piece. Apart from this, there is no speech or dialogue. This is unusual as we are not formally introduced to the main character. 
There are two main locations- hie bedroom and a large open space of wilderness. 
He leaves the normal location of his bedroom and runs away to the countryside. His bedroom is messy and dark which hugely juxtaposes from the countryside, as it is huge, open, and empty. 
There are a few credits at the beginning of the piece. The main character walks in and the credits are at the bottom of the screen in white writing. The writing appears similar to handwriting. The title of the piece appears over the middle in the same handwriting. I like the credits as they don't take away from any action and are visually pleasing. 

This is my second student-made opening. It is called 'Dog Tag' and is by 'Skyline productions'. During this opening, you actually get told quite a lot about the plot- we find out that even though he is a war hero, the government is fighting against him, and have accused him of something he hasn't done. We also find that the government has 'teamed up' around the world in order to assassinate the president. He has knowledge of this attempt, which is why they court-marshalled him. This is quite a crucial part of the movie, so we are told a lot of the plot primarily. 

There appears to be one key character. This is the person running from the government officials. We know him to be the main character, however, he never tells us his name or anything about himself, other than what we already know. 

At the beginning of the piece, there is a monologue playing over the top of the action. This is what gives us all of the information. It only lasts for around one minute, and the rest of the scene is just action, with minimal dialogue. 

There is one location- the streets of London. This changes as he runs through them, but he still remains in London itself- the beginning is set next to the Thames, and the end is set in a tunnel. 

The credits are shown throughout the entire two minutes. They appear around the action in a white text. Overall, the credits are effective as they are clear, yet don't cover too much of the action. 

This is my final student-made opening. 

There is not a lot of plot introduced in the opening two minutes, other than the idea that perhaps the person with the wheelbarrow murdered and buried the other person. We cannot be fully sure who each character is as they have their faces covered, and we cannot fully tell that the person is a murderer. 

We can't really assume how many key characters there are. We see two characters, and we can clearly see that one of them is important, but without watching the whole movie, we cannot tell who the person in the wheelbarrow is, and if they're important. 

There is no dialogue and the opening is just the man taking the body and burying it.

The scene is based in the countryside and the characters remain there throughout the entire opening. They travel through the area but they don't really change location throughout. 

The credits appear to the side of the action and are also in white. They are effective as they are muted, and do not distract from the plot.