If you've ever tried to download a video from Reddit, you've probably ended up with a silent MP4 file. No audio. No error. Just a video that should have sound but doesn't. This isn't a bug in your downloader. It's how Reddit stores videos. The Problem Most video platforms (YouTube, Twitter, etc.) serve videos as a single muxed file — video and audio combined in one stream. Easy to download, plays anywhere. Reddit doesn't do that. When you upload a video to Reddit, their backend splits it into two separate files stored on v.redd.it : DASH_720.mp4 ← video only, no audio track DASH_audio.mp4 ← audio only Enter fullscreen mode Exit fullscreen mode When you watch on Reddit, the player loads both files and syncs them client-side. When you download, most tools grab only the video file. Why It Happens Reddit uses MPEG-DASH (Dynamic Adaptive Streaming over HTTP). DASH is designed for adaptive streaming where the player picks the best video quality and audio quality independently based on bandwidth.…