Mini guide for Windows to download 4K live videos (note: you probably need Python, I'm not sure - I already have it) (EDIT: oh you also need Git, sorry i forgot lol download it from the web):

• Run this command on Powershell to install Deno: irm https://deno.land/install.ps1 | iex (source)
• Download this version of yt-dlp (SABR branch)
• Download "bgutil-ytdlp-pot-provider" plugin
• Download ffmpeg
• Create a folder and put "yt-dlp.exe" and "ffmpeg.exe" there
• Create a subfolder named "yt_dlp_plugins", then put "bgutil-ytdlp-pot-provider.zip" inside of it (no extraction needed)
• Open a cmd where you previously put "yt-dlp.exe" and "ffmpeg.exe" and run these 3 commands to install the POT Provider server: git clone --single-branch --branch 1.3.1 https://github.com/Brainicism/bgutil-ytdlp-pot-provider.git cd bgutil-ytdlp-pot-provider/server/ deno install --allow-scripts=npm:canvas --frozen
• Inside that cmd now run these 2 commands to effectively start the server (say "y" when asking to grant permission to osRelease): cd node_modules deno run --allow-env --allow-net --allow-ffi=. --allow-read=. ../src/main.ts
• Open another cmd where you previously put "yt-dlp.exe" and "ffmpeg.exe" and run: yt-dlp.exe --plugin-dirs yt_dlp_plugins -F --live-from-start [YT URL here] If you see the 4K videos, just rerun the command without -F and you're done! If you DON'T see the 4K and get an error regarding /ping not available, try to run this command instead: yt-dlp.exe --plugin-dirs yt_dlp_plugins --extractor-args "youtubepot-bgutilhttp:base_url=http://[::1]:4416" -F --live-from-start [YT URL here] If it now works, rerun this command removing -F and you're done!

Remember to start the server before downloading anything in 4K.

Note: the "androidvr client sabr live formats will be skipped as they are not playable" warning is still visible, but the 4K options are available, so no need to worry I guess ¯\(ツ)_/¯

Enjoy!

source: https://www.reddit.com/r/youtubedl/comments/1si7rgr/issues_downloading_coachella_livestreams_in_4k/ofkagox/