Just to confirm, are you referring to the 4 videos in the Cisco NGIPS Training Videos page here on the Cisco Learning Network?
If yes, I just tried the videos and did not encounter any issues. If you haven't already done so, please have a look at the Trouble Viewing Video? page for a couple of steos that you can try. If you continue to have issues viewing the videos, please let me know which browsers and browser versions you are using.
Cisco Learning Network Moderator