I am using Nvidia's Shadowplay and I can't watch any of the videos on my local machine. I have the latest version of VLC player and it can't play the video. Windows default video player can't either. Lastly I tried Quicktime and it played it but every few seconds the video would skip. Does anyone know how to watch these H264 videos?
Source : http://www.geforce.com/whats-new/articles/geforce-experience-1-7-launches-with-geforce-shadowplay
For local playback, we recommend Windows Media Player or MPC-HC (http://mpc-hc.org/)
Good luck.