yt-dlp has #Nitter support now!
$ yt-dlp --write-auto-sub --sub-lang en,es -f '[height<800]' https://nitter.net/elonmusk/status/1595250835096621057#m
[Nitter] 1595250835096621057: Downloading webpage
[Nitter] 1595250835096621057: Downloading m3u8 information
[info] 1595250835096621057: Downloading 1 format(s): 320
[hlsnative] Downloading m3u8 manifest
[hlsnative] Total fragments: 4
[download] Destination: Elon Musk - Found in closet at Twitter HQ fr 🤣🤣 [1595250835096621057].mp4
[download] 100% of 484.92KiB in 00:12 at 39.13KiB/s