streamlink --hls-live-restart https://www.youtube.com/watch?v=xRIPZM6d9Dg 1080p,best -o rec1.ts

streamlink --hls-live-restart https://www.youtube.com/watch?v=xRIPZM6d9Dg best -o c:\rec1.ts

streamlink --hls-live-restart https://www.youtube.com/watch?v=xRIPZM6d9Dg best --stdout | ffmpeg -i pipe:0 -c copy -bsf:a aac_adtstoasc -f mp4 -movflags empty_moov+separate_moof+frag_keyframe c:\rec2.mp4