[imiric]

This is neat, but you can do this offline by pasting links in a text document, separated by newlines, which is essentially an M3U playlist, and opening it with mpv+yt-dlp. Works cross-platform.

[svnpenn]

this is highly misleading, as YT-DLP downloads by default, not streams

[charsi]

vlc can play youtube links so you just need to open the m3u file in vlc if you don't want to download.

[tobz1000]

mpv will stream by default, but requires youtube-dl or yt-dlp to be installed separately.