Importing a slow-mo video to Windows I recorded a slow-mo video using my iPhone 5s. How do I import that video to my Windows PC without losing the slow-mo effect?

When uploading the video directly to Facebook from the iPhone (from the film roll), the slow-mo effect is preserved (thus, slow-mo effect is part of the video file itself).

I've tried with "Import pictures and videos" which gets the video on the PC, but the imported video seems to lose the slow-mo effect both when playing it on the PC and after uploading the imported video to Facebook.
The slow-motion effect applied to the video in Photos.app is not actually applied to the video file. This means that the 120 fps video remains at 120 fps and is played at this higher fps in Windows.

To slow down the video, use a video editor, either on Windows or on the iOS device (such as iMovie which is free on the 5s) to save the slowed video file.