fandom quiz

echan and I have spent seriously, like, three hours, discussing fannish categorizations of material as it strays further and further from canon. We are interested in your opinions on the following:

In reference to vidding:
What constitutes canon (or nonviolation of canon)?
What constitutes an AU?
What constitutes constructed reality?

Where are the lines between these categories? What separates them? What rationales and characteristics can you use to differentiate between them?

Where does crossover fall in this scale?
Does the use of secondary sources make a vid fall into one category or another?

Second verse: would you care to tackle the same questions (as relevant) wrt fanfiction?

If you're very good, I may post my own thoughts on this matter when I am less drunk.