+ `yt-dlp https://youtube.com/playlist?list=PLxA687tYuMWhNfQ6ILYpFCqwXvKmUk4XQ&si=wLBuSm7A0tJCB2vm`
+ `for f in *.webm; ffmpeg -i "$f" -vn -q:a 2 (path change-extension .m4a "$f"); end`
+ `rm -rf *.webm`
+ `for f in *.m4a; set t (string replace -r ' \[[^]]+\]$' '' (path change-extension '' "$f")); ffmpeg -i "$f" -map 0 -c copy -metadata title="$t" -y (path change-extension .tmp.m4a "$f"); and mv (path change-extension .tmp.m4a "$f") "$f"; end`