Finalized story idea

Going off what everyone told me after I talked with them, as well as the feedback I received in my mail, I figured that the best story idea I had was the documentary, so I decided that it would be a good idea to write down the outline of the best idea I had regarding this topic;

• The protagonist of the story is a teenager who's touring London with his parents. He doesn't like being a tourist, though, so he tries to act disinterested (I used to do this all the time when I went on holidays with my parents when I was about 14-16)
• He takes out his smartphone and decides to start taking selfies to post to his facebook.
• In the camera, the teenager spots a Falcon catching some of its prey on the wing.
• He's suddenly fascinated by this bird that he's never seen before.
• The rest of the story focuses on the boy using his camera phone to take videos of the Falcons living in London as a way of showing how they actually live their lives.

The next ideas I had were much looser, but if done right I feel I could work at least one of them into the story without too much difficulty.

• To add a bit of drama to the story, at one point, the teenager could see someone trying to sabotage a Falcon's nest and have to come up with a way of stopping that person from sabotaging the nest.
• The saboteur could be a chav, an aggravated homeowner, or someone who just doesn't like Falcons all that much. 
• I feel that it would help to address some of the dangers that London offers for Falcons without coming across as too preachy.
• Alternatively, I could work in the story about the Falcon that fell from its nest (after attempting a premature flight) due to heat stroke, which could add another point of drama.
• The teenager might end up speaking with one of London's birdwatchers and make a friend based off a similar interest.

At the end of the day, the extra ideas still need to be tied down a lot more before I can make any solid decisions about them, but the research that I do in the following week should help me fill in the blanks.