Some time back, there was a really awesome Wincest video going around that was set to the song 'An Epic Age' by Immediate Music from the Album 'Trailerhead'. The story was set in Season 4 and was about Castiel trying to prevent Sam and Dean from getting together, because that was the last of the 66 Seals. It ended with the boys falling into bed together and Lucifer rising.

I'm pretty sure I originally saw this vid on YouTube, but I just can't manage to find it anymore. Anybody have a link or a saved copy, by any chance?

EDIT: FOUND! Link in comments.