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

* commit '685953ae53b74007ec2049e0b01a9ad5bb3e9d1b':
  replace tools videos with latest reto studio videos.

Change-Id: Ib2532713d29fe7e35765fb7d70fd4521caf3f6c6