I agree with many of the comments on that video. By that line of reasoning almost any kind of formatted data could be considered a "programming language". I'm

I agree with many of the comments on that video. By that line of reasoning almost any kind of formatted data could be considered a "programming language". I'm not buying it. I think there is a valuable distinction between a programming language and a markup language. HTML is not a programming language, it's a markup language (hence the last two letters of its name).