>>36589820sometimes the stream is too new and the file still has to be rendered server-side.
Youtube-dl and ffmpeg work well for me cuz i'm on linux and working with the terminal is just common to me. If you're on windows you might be able to find some other tools that help with this.
you can check the file formats by doing
youtube-dl -F [URL]
for this example i'll use ID 91 since that's the smallest(256x144) audio-and-video non-DASH mp4 video format, which are easy to work with.
i then do
youtube-dl -f 91 -g [URL]
which returns the raw m3u8 file url, which consists of segments. i then enter the url into ffmpeg
ffmpeg -ss 00:10:00.0 -i "[M3U8 URL]" -to 00:10:0.10 -an kikum.webm
important here is to put -ss before -i so it knows to start seeking at that time. -an mutes the audio (for 4chan webm)
i usually leave out the -to time and just cancel the command after a while myself.
