Robinhoods00/Course-extractor ? reverse-engineered prompt

Build me a simple Heroku ready app for downloading and managing educational videos and PDF files from a few different course platforms. I want it to support both normal content and protected content where my account already has access, and I want the setup to be easy so I can just edit the config file, set environment variables, and deploy.

Please make the main entry point work with the plugin setup already in the repo, and keep the code organized so it can handle different platforms like Classplus, Study IQ, Physics Wallah, Khan GS, Careerwill, Vision, and Allen style Vimeo content. It should be able to pull video and document files, handle m3u8 links where needed, and give clear progress or status messages while it works. If anything about the current approach is outdated, look up the current docs online and update it so the app actually runs cleanly. Also make sure it is packaged properly for Docker and Heroku so I can deploy it without having to rebuild the whole project structure.