Very much text based. Most of the time I'm in an area where video just won't cut it - no signal, or need for quiet for example. If I know I'm not going to have signal, I can load an article up and it's there (most of the time; sometimes Chrome will be an idiot and try to reload it for me). I don't have to worry about whether or not there's subtitles or decent CC.
I can sit and re-read and re-re-read something until it sinks in much easier than rewinding a video. And I have yet to figure out how to copy/paste code snippets from a video.
This is actually something that's been annoying me - at least one site I frequent that curates programming tips has become increasingly video based. And more often I'm coming across videos for tutorials and "articles" on stuff I'd like to learn, instead of something I can sit down and read.