[pocket_titan]

I'm a huge fan of http://openmusictheory.com/. It's succinct, comprehensive and utilizes examples where relevant (such as songs through embedded vimeo players - not exactly revolutionary, but it's something a book can't offer). Did I mention it's open source?

EDIT: I also really like this YouTube series: https://www.youtube.com/watch?v=mdEcLQ_RQPY&t=74s&ab_channel.... The videos are relatively short, so if you like fast-paced high-density videos then you should enjoy this format.

[zozbot234]

OMT is a good resource, but it seems to have gone unmaintained https://github.com/openmusictheory/openmusictheory.github.io Someone should either get in touch with the authors or fork the project.