replace tools videos with latest reto studio videos. am: b69830f76c am: 685953ae53
am: 55272f0f5e

* commit '55272f0f5e695c4936af368d2774a3f78108ff56':
  replace tools videos with latest reto studio videos.

Change-Id: I76751d738039f95559393471a33f17a45772749a