Documentation
Player and media library
Local files, YouTube, HLS, playlists, Up Next, and system media controls.
Sources
Player opens local audio and video, folders, single YouTube links, M3U/M3U8, and compatible HTTP(S)/HLS sources.
Library and playlists
Add files and folders to the library, create persistent playlists, and change display names. Rename affects only the library record.
The Up Next queue is separate from playlists, takes playback priority, and does not persist after restart.
YouTube quality
YouTube offers Auto, Best, Audio, and specific formats. “All qualities” includes choices Thunder can prepare by merging streams or using HLS.
System integration
Thunder reports metadata, state, and position to the operating system. Media keys control playback, and macOS also provides a Dock menu.
Media that Chromium cannot play directly is prepared through the local FFmpeg/HLS fallback.