archiving

yt-dlp

Free, open-source command-line tool for downloading video and audio from thousands of sites. Actively maintained on GitHub, runs on Windows, macOS and Linux, and is the tool most other download apps wrap.

Why I recommend it: useful for saving your own recorded talks, webinars and openly licensed lectures so you can watch or transcribe them offline. Downloading material you have no right to is a different matter and often breaks the site's terms or the law where you live, so keep it to your own content and openly licensed work.