$ mpv -v https://www.youtube.com/watch?v=G22aFf6m9yc
[cplayer] Command line options: '-v' 'https://www.youtube.com/watch?v=G22aFf6m9yc'
[cplayer] mpv v0.40.0 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
[cplayer] built on Jul 7 2025 12:57:37
[cplayer] libplacebo version: v7.351.0
[cplayer] FFmpeg version: 7.1.1 (runtime 7.1.2)
[cplayer] FFmpeg library versions:
[cplayer] libavcodec 61.19.101
[cplayer] libavdevice 61.3.100
[cplayer] libavfilter 10.4.100
[cplayer] libavformat 61.7.100
[cplayer] libavutil 59.39.100
[cplayer] libswresample 5.3.100
[cplayer] libswscale 8.3.100
[cplayer] Configuration: -Dandroid-media-ndk=disabled -Daudiounit=disabled -Dcaca=disabled -Dcdda=enabled -Dcoreaudio=enabled -Dcocoa=disabled -Dcplugins=enabled -Dcuda-hwaccel=disabled -Ddirect3d=disabled -Ddvbin=disabled -Ddvdnav=enabled -Degl-angle-lib=disabled -Degl-angle-win32=disabled -Degl-drm=disabled -Degl-x11=disabled -Dgl=enabled -Dgl-cocoa=disabled -Dgl-x11=disabled -Dhtml-build=disabled -Dios-gl=disabled -Djack=disabled -Djavascript=disabled -Djpeg=disabled -Dlibarchive=enabled -Dlibbluray=enabled -Dlibmpv=true -Dlua=lua5.2 -Dmanpage-build=enabled -Dopenal=disabled -Dopensles=disabled -Dpdf-build=disabled -Dpulse=disabled -Dpthread-debug=disabled -Drubberband=disabled -Dsdl2=enabled -Dsdl2-audio=enabled -Dsdl2-gamepad=disabled -Dsdl2-video=enabled -Dshaderc=disabled -Dsixel=enabled -Dswift-build=disabled -Duchardet=disabled -Dvapoursynth=disabled -Dvideotoolbox-gl=disabled -Dvulkan=disabled -Dwayland=disabled -Dx11=disabled -Dxv=disabled -Dzimg=enabled -Dzlib=enabled -Dprefix=/opt/local -Dbuildtype=release -Dwrap_mode=default --native-file=/opt/local/var/macports/build/_opt_local_ppcports_multimedia_mpv/mpv/work/meson_native.ini
[cplayer] List of enabled features: bsd-fstatfs build-date cdda coreaudio cplugins darwin dvdnav ffmpeg gl glob glob-posix gpl iconv lcms2 libarchive libass libavdevice libbluray libdl libplacebo lua5.2 mac-thread-name posix posix-shm sdl2 sdl2-audio sdl2-video sixel vector zimg zimg-st428 zlib
[cplayer] Reading config file /opt/local/etc/mpv/encoding-profiles.conf
[ifo_dvdnav] Opening /opt/local/etc/mpv/encoding-profiles.conf
[bdmv/bluray] Opening /opt/local/etc/mpv/encoding-profiles.conf
[file] Opening /opt/local/etc/mpv/encoding-profiles.conf
[cplayer] Applying profile 'default'...
[cplayer] Setting option 'v' = '' (flags = 8)
[ifo_dvdnav] Opening /opt/local/etc/mpv/input.conf
[bdmv/bluray] Opening /opt/local/etc/mpv/input.conf
[file] Opening /opt/local/etc/mpv/input.conf
[input] Parsing input config file /opt/local/etc/mpv/input.conf
[input] Input config file /opt/local/etc/mpv/input.conf parsed: 0 binds
[clipboard] Initialized vo clipboard backend.
[cplayer] Waiting for scripts...
[cplayer] Set property: user-data/osc/visibility="auto" -> 1
[cplayer] Set property: user-data/osc/margins={"l":0,"b":0,"r":0,"t":0} -> 1
[cplayer] Set property: user-data/osc/margins={"l":0,"b":0,"r":0,"t":0} -> 1
[cplayer] Done loading scripts.
[cplayer] Running hook: auto_profiles/on_before_start_file
[cplayer] Set property: user-data/osc/margins={"l":0,"b":0,"r":0,"t":0} -> 1
[osd/libass] libass API version: 0x1704000
[osd/libass] libass source: tarball: 0.17.4
[osd/libass] Shaper: FriBidi 1.0.16 (SIMPLE) HarfBuzz-ng 11.2.1 (COMPLEX)
[osd/libass] Setting up fonts...
[osd/libass] Using font provider coretext
[osd/libass] Done.
[cplayer] client removed during hook handling
[cplayer] Running hook: auto_profiles/on_load
[cplayer] Failed sending hook command auto_profiles/on_load. Removing hook.
[cplayer] Running hook: ytdl_hook/on_load
[ytdl_hook] URL matches included substring ^%w+%.youtube%.com/. Trying ytdl first.
[ytdl_hook] No youtube-dl found with path yt-dlp in config directories
[ytdl_hook] Starting subprocess: [yt-dlp, --no-warnings, -J, --flat-playlist, --sub-format, ass/srt/best, --format, bestvideo+bestaudio/best, --sub-langs, all, --write-srt, --no-playlist, --, https://www.youtube.com/watch?v=G22aFf6m9yc]
[cplayer] Set property: user-data/osc/margins={"l":0,"b":0,"r":0,"t":0} -> 1
[ytdl_hook] Found youtube-dl with path yt-dlp in PATH
[cplayer] Set property: user-data/mpv/ytdl/path="yt-dlp" -> 1
[cplayer] Set property: user-data/mpv/ytdl/json-subprocess-result={"error_string":"","killed_by_us":false,"stderr":"","status":0,"stdout":""} -> 1
[ytdl_hook] status: 0
[ytdl_hook] reason:
[ytdl_hook] stdout:
[ytdl_hook] stderr:
[ytdl_hook]
[ytdl_hook] youtube-dl failed: unexpected error occurred
[cplayer] Running hook: ytdl_hook/on_load
[ytdl_hook] playlist hook
[stream_callback] Opening https://www.youtube.com/watch?v=G22aFf6m9yc
[ffmpeg] Opening https://www.youtube.com/watch?v=G22aFf6m9yc
[ffmpeg] Mime-type: 'text/html'
[demux] Trying demuxers for level=normal.
[lavf] No format found, try lowering probescore or forcing the format.
[demux] Trying demuxers for level=unsafe.
[lavf] No format found, try lowering probescore or forcing the format.
[cplayer] Opening failed or was aborted: https://www.youtube.com/watch?v=G22aFf6m9yc
[cplayer] Running hook: ytdl_hook/on_load_fail
[ytdl_hook] URL matches included substring ^%w+%.youtube%.com/. Trying ytdl first.
[cplayer] finished playback, unrecognized file format (reason 4)
[cplayer] Failed to recognize file format.
[cplayer] Running hook: ytdl_hook/on_after_end_file
[cplayer] Exiting... (Errors when loading file)