From one of the comments there: "if someone (...) could explain why the line has always been "the metadata" when it is obvious that mass interception of content has always been part of the equation i would be grateful. i would also be grateful if from now on every article relating to the NSA scandal will mention that fact that there is bulk collection of content. i would also be grateful if from now on every time a p…
No, this is also metadata. They are only taking a screenshot every few minutes, with as aim to get a clear picture of the face of the person operating the computer. Just like an email header contains a From-address in the content that's metadata, a webcam session contains the same metadata in the form of these screenshots of people's faces.
They're not collecting the data, i.e. the moving webcam video + voice. They have no idea what's being said. Just metadata.