Hacker News on 27 October 2020

• RIAA’s YouTube-dl takedown ticks off developers and GitHub’s CEO
• Over 80% of Covid-19 patients in a hospital study have Vitamin D deficiency
• AMD to Acquire Xilinx
• A Guy Walks into an Apple Store
• Type in the exact number of machines to proceed
• Facebook has sent a cease-and-desist letter to researchers
• Mobilizon – A free, federated tool for events and groups
• Org Mode's new site
• Sketch: Proud to Build a Truly Native Mac App
• Next.js 10