History is Awesome!

This year, 2012, is the 100 year anniversary of the sinking of the Titanic, the rise of the Republic of China for its short and doomed history, the election of that authoritarian and scummy waste of space Woodrow Wilson, and most crucially the First Balkan War. Of these anniversaries it could be argued that the two most crucial in a long-term historical sense were the end of the line of Chinese Emperors with the last Qing Emperor disbanding and the combination of the end of the Italo-Turkish War and the start of the First Balkan War, which brings me to my point:

Of these two sets of events, which would qualify, if either do, as the more "important" events? Personally I would qualify the fall of the Qing Empire as more important in a long-term sense. Primarily because the Chinese Emperor had been *the* crucial underpinning of an entire civilization in a legally unbroken chain from the 3rd Century BCE to the 20th Century, and because the fall of the Chinese Empire ultimately led to the outbreak of WWII in Asia no matter what did or did not happen in Europe.

However with the outbreak of the Arab Spring and the Civil War in Libya, as well as the continued chaos in the Balkans, it's worth noting that the Italo-Turkish War is how Cyrenaica and Tripoli were combined into Libya, while the First Balkan War set in motion the process of Great Powers dancing to the tune of small states that culminated in what will have *its* centennial 2 years from now. With WWI arguably globally more important by far than WWII. So of the end of a very ancient civilization and the dawn of a new one or the tipping point where WWI became an inevitability, which would be more important in a historical sense? 

I don't know how active this community is, but I figured this would be the best place to ask this question.

So, I'm writing a paper for a college senior level history class and it requires me to use at least one primary source. However, the source I've chosen is video and I've never actually written a paper before that uses video as a primary source, so I'm not quite sure how to approach it. How does one exactly incorporate it when all your other sources are text? Do you say that in "x film" this scene happens and this indicates something about what the film is trying to say?

The source in question for my paper is a propaganda film, so I know to mention that part and I do have some idea of how I do want to use it in my paper, I just would like advice for doing this sort of thing.