No, there's content from lots of different conferences (though, GOTO is there a lot -- maybe a good indicator of quality?)

popularity ≠ quality

for a Mr. Beast video, maybe that's true, but for a specific audience like "Developer Conference Talk" probably a decent proxy

rust vs javascript ?

Having watched a lot of the goto talks, I'd say that they're like a good tech conference: ~5-10% of the talks could have a major impact on your work/career, 20-30% of the talks are interesting and slightly useful, and the remaining talks are basically product pitches / sponsor slots, which can be useful but are often biased.

If I'm not asking for too much, I'd love to see an example of a talk you consider a member of the "could have a major impact on your work" bucket

It appears to contain a bunch of other conferences. NDC, ElixirConf, etc.