It's certainly better at some things, but in general, I think it's a worse platform for conveying information.

- find content within a video is difficult (I'd rather search text) - you're at the mercy of the presenter's pace (you can adjust speed, but that's only part of the story) - sometimes listening isn't an option - sometimes presenters rely too much on visuals, so you have to watch as well - video can't be as easily edited as text, so most people just put subtitles to point out errors (this doesn't help if you're not watching) - less easy to link to additional information than text

In general, unless someone is demonstrating a step-by-step, graphical process, I prefer text.