Keynote 6.2: prevent it from copying videos into project

I'm using Keynote 6.2 under 10.9.4.

I have a keynote 5 presentation where I carefully inserted videos into the presentation, but did not embed the videos into the project. All the videos used are in a separate "videos" folder.

When I opened the project in Keynote 6.2 and converted it, suddenly all videos (5+ GB) of them are now stored inside the Keynote project file. My preferences (Keynote / Preferences / General/ Saving : Copy audio and movies into document : OFF )

I need to have multiple keynote presentations that all reference the video files stored in a common location. This worked fine in Keynote 5. Is there a way to do it keynote 6?