What follows is an an organized and curated list of content. Click here for an exhaustive list of content on Obadiah
Homer Heater Jr.: 9. Obadiah  Part of a series on the Old Testament prophets. History, Background, Extensive paragraph outline.
Kenneth Boa: 39. Obadiah  Part of the series: Visual Survey of the Bible.
Bill McRae: 27. Amos and Obadiah  Part of the series: Survey of the Bible.
Imanuel Christian: 40. The Book of Obadiah Part of the series: From Creation to the Cross.
Tom Schetelich: Obadiah: Understanding Edom 
Does God Have Enemies? – The Message of Obadiah: Mark Dever  Capitol Hill Baptist Church.
Ray Stedman: Obadiah: Death to Edom! [, , Translated] Peninsula Bible Church. Spanish translation available.
S. Lewis Johnson: Obadiah, the Prophet of Edom’s Doom [, ] 1 lesson.
John Piper: Eagle Edom Will Come Down [, ] 1 lesson.
Study Helps and related
Tom Constable: Tom Constable’s Expository Notes on Obadiah  This is also available in the Net.Bible.org Study Environment.
David Malick: An Introduction to the Book of Obadiah 
J. Hampton Keathley, III: 7. The Minor Prophets  Part of the series: Concise Old Testament Survey.
Hampton Keathley IV: 4. Obadiah Part of the series: The Minor Prophets.