They offer courses supported by YouTube videos. They also offer certifications for subjects like JavaScript Algorithms and Data Structures, Backend Development and APIs, and Machine Learning with Python.
I recently recommended the Odin project to a friend that studied web development but, due to the pandemic, didn't get to work as a developer and is now rusty.
Freecodecamp is a resource I want to explore, but never find the time to.
Thanks for the contribution!