SuryaXanden/Automated-Socialmedia-Posting ? reverse-engineered prompt

Build me a simple web app that lets me post the same photo or video to multiple social media sites at once, like Facebook, Twitter, and Instagram.

I want a clean Flask page where I can upload media, add a caption, choose which platforms to send it to, and then click one button to publish. Use browser automation so it can log in and post for me, and make it feel like a small media broadcast portal. If anything needs current setup details, look up the latest docs online.

Please keep it easy to run locally, with clear error messages if a login fails or a platform can’t be reached. Also make the interface straightforward enough that a non technical person could use it without much explanation.