Starting a youtube video (playback) with mpv takes above 5 seconds

[geextahslex]

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Starting a youtube video (playback) with mpv and yt-dlp takes above 5 seconds on average, is there a way to speed this up?
I don't use yt-dlp to download files only for youtube video playback in 1080p/1440p/4k VP9.
On discord someone give me this line --extractor-args "youtube:player_skip=webpage,configs,js;player_client=ios" but this breaks the seek functionality.

Thank you :)

Information:
I'm on Windows 10 22H2
latest nightly yt-dlp
mpv v0.38.0

Provide verbose output that clearly demonstrates the problem

• Run your yt-dlp command with -vU flag added (yt-dlp -vU <your command line>)
• If using API, add 'verbose': True to YoutubeDL params instead
• Copy the WHOLE output (starting with [debug] Command-line config) and insert it below

Complete Verbose Output

As I use yt-dlp only with mpv, I don't know which command is going into yt-dlp

[bashonly]

No. Most of this startup time is yt-dlp decoding the nsig parameter, which is necessary for web client formats (or else their download speeds will be throttled to 30KB/s). The only alternative is the extractor-args given to you on discord.

[geextahslex]

I understand.
What does this line actually do? script-opts-append=ytdl_hook-try_ytdl_first=yes
script-opts=ytdl_hook-try_ytdl_first=yes,ytdl_hook-exclude="%.webm$|%.ts$|%.mp3$|%.m3u8$|%.m3u$|%.mkv$|%.mp4$|%.VOB$"

[bashonly]

That's an mpv argument, not a yt-dlp option. But from what I can tell, ytdl_hook-try_ytdl_first=yes tells mpv to try yt-dl/p first when given URL input (instead of trying to playback the URL with mpv directly first), and ytdl_hook-exclude tells mpv to exclude URLs ending in .webm etc from the ytdl/p hook and instead playback those URLs directly with mpv.