downloading online video #

generally it’s either a file or an hls stream. files are easy and hls streams are mostly opening devtools>network in firefox and searching for m3u8.

vimeo #

get a vimeo account (duh)
buy/rent your vod
export cookies for vimeo.com (use a browser extension)
use youtube-dlp like this:

yt-dlp --cookies cookies.txt VIMEO_VOD_URL

get the subtitles: open devtools and go to the network tab, search for vtt and download the files for the language you want