[markus_zhang]

I think it depends.

From my experience, if I want to learn something a bit more general, let's say computer science, that is not specifically bundled with a piece of software, a book is the best medium. Videos are great, but have a few important cons: 1) It's difficult to see code on screen; 2) It's too slow and difficult to index

And a real book is always better than an e-book because: 1) It's easier to index; 2) a bit better for my eyes.

However, whence the learning target focuses on a specific software, let's say Unity, videos immediately shine over the other mediums as it's much easier to learn the interface with videos.