https://www.youtube.com/watch?v=7pa54hWROpQ –An overview of the Assyrian Empire from TED-Ed done by Marian Feldman of Johns Hopkins University. It discusses why the empire is significant, what it is known for today, and why it eventually collapsed.
https://www.youtube.com/watch?v=yZlqgtdQoHo – This video is from the History Channel. It is an introduction to the life and power of Cyrus the Great and the Persian Empire.
https://www.youtube.com/watch?v=B736-QoSLh8 – Khan Academy video covering the prelude to the Peloponnesian War. It has a great depth of information regarding the Eastern Mediterranean during this period. Also included is a separate video specifically concerning the Peloponnesian War.