For better or for worse people are using Twitter Spaces more and more: audio-only conversations on Twitter. Simon Willison recently hosted one and wrote a TIL how to download it. I helped because it's actually easier than his initial solution, so I'm copying that here:
Open the Twitter Spaces page, open your Firefox developer tools console in the network tab, filter for "m3u", then hit "Play" on the page. The network tab will capture the URL to the playlist file. Copy that.
youtube-dl (or one of its more recent forks like yt-dlp) to download the audio:
This will result in a
.mp4 file (media container):
$ mediainfo "playlist_16798763063413909336 [playlist_16798763063413909336].mp4" General Complete name : playlist_16798763063413909336 [playlist_16798763063413909336].mp4 Format : ADTS Format/Info : Audio Data Transport Stream [...] Audio Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity [...]
To extract only the audio part you can use ffmpeg:
ffmpeg -i "playlist_16798763063413909336 [playlist_16798763063413909336].mp4" -vn -acodec copy twitter-spaces-recording.aac