from thread
RenameExtrasAsSpecials v0.0.0.1.zip
Purpose
Prefix "extras" with S00E1000+ to ensure extras show in ui, do not incorrectly match against tvdb and do not clog up "continue watching"
Requirements
Powershell Core / path to pwsh.exe
Windows (could be tweaked for other platforms supporting powershell core)
minor powershell understanding to tweak to your environment
backup of content prior to use and caution as the script renames files