I wouldn't be surprised if pornhub-dl exists. ;-)

    wc -l yt-dlp/*/*/*porn*
       75 yt-dlp/yt_dlp/extractor/alphaporno.py
      127 yt-dlp/yt_dlp/extractor/eporner.py
       73 yt-dlp/yt_dlp/extractor/hellporno.py
       33 yt-dlp/yt_dlp/extractor/lovehomeporn.py
       60 yt-dlp/yt_dlp/extractor/porn91.py
      101 yt-dlp/yt_dlp/extractor/porncom.py
       41 yt-dlp/yt_dlp/extractor/pornez.py
       78 yt-dlp/yt_dlp/extractor/pornflip.py
      117 yt-dlp/yt_dlp/extractor/pornhd.py
      814 yt-dlp/yt_dlp/extractor/pornhub.py
       83 yt-dlp/yt_dlp/extractor/pornotube.py
      103 yt-dlp/yt_dlp/extractor/pornovoisines.py
       54 yt-dlp/yt_dlp/extractor/pornoxo.py
       76 yt-dlp/yt_dlp/extractor/sunporno.py
       65 yt-dlp/yt_dlp/extractor/watchindianporn.py
      182 yt-dlp/yt_dlp/extractor/youporn.py
       65 yt-dlp/yt_dlp/extractor/yourporn.py

That appears to be a thing on yt-dlp [1]

[1] - https://github.com/yt-dlp/yt-dlp.git

I'm sure youtube-dl works, but one google away is https://github.com/Nukesor/pornhub-dl which seems to have site specific features.