It's useful to keep in mind that article authors generally don't write their own headlines on news sites; the article itself doesn't ever claim MTV's animation "disrupted cable," whatever that means, but instead claims that they were a laboratory "for animators who wanted to work outside of TV conventions at the time," which is a pretty defensible claim.

(Also, remember that headlines often get changed after publication; the headline as I'm writing this actually says "Here's How Beavis, Butt-Head And Daria Upended TV Animation". Due to the quirks of many CMSes, the `<title>` tags often retain the original headline.)