Im the Nyanners Archive anon as i only archive nyanners content i thought this might be usefull to people who want to archive other peoples content heres a short video that shows how to get the M3U8 Link:

I tested this if you get the M3U8 link before the stream ended at any point after the stream started from the recent broadcast vod you can still acess the vod even if it got deleted with the same link (the link will work for 60 days so as long as the vod is on the twitch servers).

Short clip on how you get M3U8 Link on chrome: https://files.catbox.moe/ecabfd.mp4

How to use that M3U8 link using vlc media player: https://files.catbox.moe/49ujpr.mp4

as you see in the end of the video just click on "browse" then choose a filename and vlc media player converts it to an mp4 file and you have the vod saved.Im aware there are other ways to download the vod from that M3U8 link but thats how i do it usualy.
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Some More usefull resources if you want to get even more into archiving (i cant realy help with most of them as i never used most of these tools i just copy and pasted what another anon posted:

Download twitch Vods: https://tleecher.com/
Record/download Twitch/YouTube/m3u8s: https://streamlink.github.io/cli.html#command-line-usage
Automatically run streamlink when a channel goes live: https://github.com/ancalentari/twitch-stream-recorder
Record a YT stream live: https://github.com/Kethsar/ytarchive
Download a YT VOD: https://github.com/yt-dlp/yt-dlp
Record live chat/download VOD chat: https://github.com/xenova/chat-downloader/