Video that discusses additional topics relating to the Italian Campaign of Justinian. Read the blog post:

Sources and further readings for those interested :
Barker, John W: Justinian and the Later Roman Empire (1966)
Moorhead, John: Justinian (1994)
Haldon, John: The Byzantine Wars (2008)
Mass, Michael (editor) The Cambridge Companion to the Age of Justinian (2005)
Scarre, Chris: Chronicle of the Roman Emperors (1995)
Procopius: The Secret History Trans. Kaldellis, Anthony/Haury, J. (2010)
Procopius: The Wars of Justinian Trans. Dewing, H.B.; Ed. Kaldellis, Anthony (2014)
Cassiodorus: Variae Trans. Barnish, SJB (1992)