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TikTok Architecture Explained: How the App Figures Out What You Want to Watch

When a video goes viral on TikTok, millions of people look at it at the exact same moment. Most people think the hard part for TikTok is sending the video file to everyone’s phones. But it isn’t. The video files are stored on servers all over the world, ready to play instantly. The real magic-and the hardest part-is the hidden…