The EU's Digital Markets Act.

Does it even apply to something like Twitter? If it applies to Twitter then surely that means it also applies to Youtube? Does that mean youtube-dl must be officially supported? I thought it only applied to digital markets (stuff like amazon, google's advertising platform, etc)

Actually, no, it doesnt apply to twitter right now (turnover and market cap is too low). But EC can assign status anyway following market investigation.

It absolutely does apply to Youtube (finally some way to challenge youtube!), but im not sure how that affects the use of youtube-dl.

The DMA covers ten core platform services:

  - online intermediation services;
  - online search engines;
  - online social networking services;
  - video-sharing platform services;
  - number-independent interpersonal communication services;
  - operating systems;
  - cloud computing services;
  - advertising services;
  - web browsers;
  - virtual assistants.

> (turnover and market cap is too low)

How do you know that, by the way? I've been trying to find this kind of info about Twitter, but I haven't really found anything.

The word 'market' here is being used in the same sense it's used in 'common market' or 'free market', not as in literally a place that directly sells things to consumers.