Ask HN: When consuming technical content do you prefer books or screencasts?

Let's say you had the choice between the following: --- 1) Read a 450 page book that you downloaded as a PDF -vs- 2) Go through a 6 hour screencast series that you can stream online or download the videos and watch offline --- Assume both options have a reasonable ToC. The book's ToC lets you jump around to where you want and the screencasts are timestamp tagged to jump between topics. Note: I didn't make this a poll because you need 200+ karma. If someone wants to convert this into a poll for me that would be amazing.