Link to video.
This is a file for an Admiral Ackbar LeaderHead. It is not a mod but rather a source for modders.
Gial Ackbar was a veteran male Mon Calamari soldier and strong revolutionary leader during the Clone Wars, the Galactic Civil War, the cold war, and the war between the Resistance and the First Order. Throughout his sixty years of service, Ackbar was regarded as a brilliant tactician.
The model is a Admiral Akbar from MS32's garrymod model pack:
https://steamcommunity.com/sharedfiles/filedetails/?id=227870289
He uses Frederick's Animation. For ease of installation here are the art defs:
Spoiler :
