This couple of videos helped me to understand how agility can be implemented into complex software development environments.

A lot of agility knowledge shared in these videos, and so many topics related to SAFe,

Video #1, this is more technical oriented, you will find things as agility, squads, continuous deployment, how teams are organized, events…

Video #2, this is more cultural oriented, where you will find the relationship with failure, innovation, hacking time, hacking events, innovation/predictability, chaos/bureaucracy

In video #2 there is an explanation about how to lead with chaos and bureaucracy that is really interesting (starts in minute 9:00), and it is represented by this picture: