If you're trying to engage people who enjoy watching lolcat videos every day, a video is probably the best medium to use.
But I suspect that the majority of the people who are likely to be interested in this topic (programmers, mathematicians, engineers, internet freedom activists) prefer to access the most information possible in the shortest time possible, accompanied by the least possible amount of unnecessary bytes, and in a format that allows quick skimming. Ergo, text.
If you're trying to engage people who enjoy watching lolcat videos every day, a video is probably the best medium to use.
But I suspect that the majority of the people who are likely to be interested in this topic (programmers, mathematicians, engineers, internet freedom activists) prefer to access the most information possible in the shortest time possible, accompanied by the least possible amount of unnecessary bytes, and in a format that allows quick skimming. Ergo, text.