How audio extraction works
This page opens when you click the audio icon in the extension popup on a detected HLS playlist. It downloads only the audio segments — skipping the (usually much larger) video track — and copies them into an M4A file with FFmpeg running as WebAssembly in this tab.
What audio format do I get?
An .m4a file (AAC audio in an MP4 container) — the original audio codec, copied without re-encoding.
Why does it sometimes ask me to pick a quality first?
Some streams expose a separate audio rendition per video quality (for example, different bitrates for 1080p vs. 480p). When that happens, you pick which one to extract before download starts.
Is this available for every video?
It applies to HLS playlists, not direct progressive MP4 files or live broadcasts — the extension only shows the audio button where it's relevant.