How do Windows 'fibers' work? Practical Reverse Engineering.

This video aims to show how to reverse engineer a specific Windows feature (fibers). The idea is not to talk about how Windows fibers works, but, naturally, the internals about how are Windows fibers implemented by Microsoft will be discovered while reverse engineering the related APIs. The C enumerations used in the video are available here: https://pastebin.com/PZ1KmrE1