There’s no commentary or soundtrack to distract from the remarkable number of feats performed in the footage.
XRL itself is described as a design study, building on a previous robot - the X-RHx - using a slightly different configuration to simplify fabrication, while minimising weight.
The robot’s carbon fibre shell houses a single battery compartment, provides space for a PC/104 control computer, and utilises three electronics stacks (each controlling two motors), spaced evenly throughout the body.
The video is an attachment to a paper presented earlier in the month at the 2013 IEEE International Conference on Robotics and Automation (ICRA 2013) by Aaron M. Johnson and Daniel E. Koditschek.
The paper, Toward a Vocabulary of Legged Leaping, can be found here.