The Old Republic Timeline 3: The Return of the Mandalorians is the third in the series of in-universe videos, providing backstory for the Star Wars: The Old Republic video game. The video is presented in the form of a record entry made in the Jedi Archives by Jedi Master Gnost-Dural. It detailed the rise of the new Mandalore and the establishment of the Blockade of the Hydian Way.

It can be viewed here:

https://youtu.be/4gpXT6JfuXU