AB Tutor v9: Playing video captures in VLC

There is a known issue in VLC 3.0.6 which causes the video to only show a black screen. This is caused by a bug in the WEBM decoder that causes it to fail if it uses multiple cores. To fix it:
  • Go to the Tools menu in VLC
  • Select Preferences
  • Select All instead of simple in the bottom left corner
  • In the tree view, select Input/codecsVideo codecsffmpeg
  • On the right, in the decoding section set threads to 1