How to record Youtube live

youtube-dl --get-id https://www.youtube.com/playlist?list=PLXopbKxiivxpnK3JeqxxY3KyUNtPqO0_K

youtube-dl --get-url --restrict-filenames <url>
ffmpeg -i <url> -t <seconds> -c copy <out_file>

youtube-dl --list-formats <url>
outube-dl -f 94 -g <url>

youtube-dl -x --audio-format m4a <url>

cat mylist.txt
file 'Pax_Intro.mkv'
file '2020-09-14 17-02-31.mkv'

ffmpeg -f concat -safe 0 -i mylist.txt -c copy test.mkv

ffmpeg -i "concat:video1.ts|video2.ts" -c copy out.ts

ffmpeg -i video1.mp4 -i video2.flv -filter_complex \
"[0:v][0:a][1:v][1:a] concat=n=2:v=1:a=1 [outv] [outa]" \
-map "[outv]" -map "[outa]" out.mp4

ffmpeg -f concat -i mylist.txt -c copy test.mkv