seq -f "...hd4b.mp4/fragment-%g-v1.m4s" 10 > video-links.txt

var URLs = UI.panels.network._networkLogView._dataGrid._rootNode._flatNodes.map(n => n._request._url);
copy(URLs.join('n'));
URLs; // displays it in the console as an expandable array

wget -i "video-links.txt" -O "video.mp4" -B "...hd4b.mp4/"

ffmpeg -i video.mp4 -i audio.wav
-c:v copy -c:a aac -strict experimental output.mp4