Merge "improved structure and organization between video and training docs on the Training landing page." into mnc-mr-docs
am: 49b17d3

* commit '49b17d3b2d3f2dc0328f475574f7c5c21d49d31f':
  improved structure and organization between video and training docs on the Training landing page.

Change-Id: I3c7bad285cd454e874a6416b18e5899e9682af43