Outstanding videos of robots

Due to the recent contributions of the scientific community about robots, here are a collection of the best videos I found on the Web. It's amazing how technology improves and the number of mysteries that lie ahead. In the following videos we can see the different robots built by Boston Dynamics (for me the most outstanding are the Big Dog and Little Dog). And we can also find the new Actroid-F presented recently in the AIST Lab Fair and other different examples of robots.

Boston Dynamics: Big Dog:

Boston Dynamics: Little Dog:

Actroid-F in AIST Open Lab:

 

Transformer Robot:

I hope you enjoy the astonishing videos!