This worked for me, ffmpeg -i https:// iphone.c-spanvideo.org/m3u8/program.501672.MP4.M20.m3u8 pelosi.mkv
the syntax not right in this example below i think?
>ffmpeg -i https:// iphone.c-spanvideo.org/m3u8/program.501672.MP4.M20.m3u8 -c copy pelosi.mkv