Colbalt.tools looks to be a very useful web tool that lets you download and save video, audio and pictures from several streaming sites (Youtube, Vimeo et al.) as well as those attached to social media posts (Twitter, Tiktok and many more).

cobalt lets you save anything from your favorite websites: video, audio, photos or gifs — cobalt can do it all!

no ads, trackers, or paywalls, no nonsense. just a convenient web app that works everywhere.

Clearly this could be misused. But if, in this world of constantly vanishing content, there is something out there that’s meaningful to you then this would be one method to get yourself an archive copy without exposing yourself to tools ridden with adverts, trackers, malware or whatever else this type of tool often seems to come with.

You can also do a few more advanced things with it should you need to, including:

  • extracting audio from a video - that’s something I’ve had cause to do with Youtube in the past.
  • specifying the codec or video quality you want.
  • remuxing an existing file to increase its compatibility.

It’s free, open source and self-hostable. Very good stuff. You can donate to the project here.