@Daojoan Really annoying
But luckily I have found an exception for coding: 
Codecademy
No video, just text and coding exercises. Directly on their platform. You code following the exercise, it corrects you and you can test yourself directly on their platform
I have a love/hate relationship with them: I love the fact that it is practical, no 30 minute video course, but the pace is really slow.
But if you want to tackle a new topic in coding, it's just great