Here's a short podcast series that talks about the Normans, including Bohemond, who set up a crusader state in Antioch, which had been Byzantine territory not long before: https://normancenturies.com/

You might also check out the podcast History of Byzantium. Although you'll have to go many hours before encountering the Norse, in the form of the Varangians.

And I also recommend the excellent book Children of Ash and Elm for a very recent overview of Viking history.