Here are the lessons from SE, as available:

Here are links to study guides similar to those covered at the Roundtable. The buttons link to an outline with questions.

Introduction to Philippians

Here is a video summary of Philippians:

Here are over 500 sermons on Philippians:
https://www.sermonaudio.com/search.asp?BibleOnly=true&currSection=sermonsbible&keyword=Philippians