"that may result in an unauthorized effort to adversely impact the security, availability, confidentiality, or integrity of an information system or information that is stored on, processed by, or transiting an information system."
It's not an effort (authorized or unauthorized) to adversely impact any of those things. It is an effort to deliver video.
You changed "effort" to "impact". You're changing the meaning of the sentence.
If someone were to hijack Netflix' traffic to create an effort to deny service, then that would be a denial of service attack and ISPs could counter that, as ISPs already counter DoS attacks.