Add deep dive videos to media, separate screencasts and talks
Add quickstart provisioning screencast
Rename screencasts to videos
Merge remote-tracking branch 'domcleal/deep-dives-media' into gh-pages

* domcleal/deep-dives-media:
  Rename screencasts to videos
  Add quickstart provisioning screencast
  Add deep dive videos to media, separate screencasts and talks