Hi, 

I have a timelapse of clouds passing behind a building. When I export the video, the building's edges are jagged, but when I look at the individual JPEGs, they buildings edges are not jagged.

I have opened the video in various videos players (so, it is not a preview issue).

Thanks.

Pascale

I don't know exactly what you mean with "Jagged edges". Try turning off motion blur when rendering, maybe that's the effect that you are seeing. Otherwise please post a photo and video.