Check out freeCodeCamp here.
Check out Codecademy here.
Check out MDN Web Docs here.
This website has amazing video courses. It is subscription-based. However some previews are available. If you are a student you can get 6 months for free through the GitHub Student Developer Pack.
Check out Frontend Masters here.
Check out Kyle Simpson - You Don't Know JS here.
Check out Udacity - Nanodegrees here.