VLC can play it like this:
streamlink.exe "hls://https://nhkwtvglobal-i.akamaihd.net/hls/live/263941/nhkwtvglobal/index_600.m3u8" best
C:\>streamlink.exe "https://www3.nhk.or.jp/nhkworld/en/tv/" best
[cli][info] Found matching plugin nhkworld for URL
https://www3.nhk.or.jp/nhkworld/en/tv/
[cli][info] Available streams: 360p_alt2, 720p_alt, 180p_alt, 180p (worst), 360p, 720p (best)
[cli][info] Opening stream: 720p (hls)
[cli][info] Starting player: C:\P\VLC\vlc.exe