Most plausibly, "sone" might represent a within a video encoding tool—similar to how "fast," "medium," or "veryslow" are x264 presets. "Sone" could be a custom preset for mobile devices or low-bandwidth streaming.
BitTorrent clients often pre-allocate files with partial names until the download finishes. If a user attempted to download a music video or tutorial named "Sonet 523 (Master).mp4" and the client crashed, the leftover file might be renamed to "sone523mp4." sone523mp4
A lightweight, minimalist option optimized for smooth rendering of high-bitrate video streams using GPU acceleration. Most plausibly, "sone" might represent a within a
The MPEG-4 Part 14 multimedia container format. It dictates how the underlying video streams (typically encoded in H.264 or H.265) and audio tracks are multiplexed together. Common Origins of Automated Media Strings sone523mp4