Apparently we've got a major discrepancy in how we define duplicates on the Sift, and there's a bit of a rift starting over it. Let's end this once and for all.
What constitutes a dupe? According to dictionary.com a duplicate is "a copy exactly like an original."
A vote for 1. means you agree a duplicate is "a copy exactly like an original."
A vote for 2. means you think any portion of another video is a duplicate. In other words, ten seconds of a video is a dupe of a two hour movie.