When the video is saved to the hard disc and edited, the replay is jerky, as if having to stream. Direct from the VIRB camera replay is perfect.
When you encounter this errors, in 80-90 % of the cases there is a problem related to the lack of codecs. For instance, Combined Community Codec Pack is a recommended codec pack when you have playback errors. Additionally, use another video player instead of the one you currently use. VLC or BsPlayer are two of the known media players on the Internet with excellent playback quality and compatibility for various files.