He's effectively equivalent to a TV news anchor reading a a teleprompter about the topic, except his message is being delivered to a larger network than many broadcasts and the message itself is less neutral and more sympathetic.
This is good from an information dissemination perspective, which has been a massive problem for this topic in the past. It's a sign that the topic is finally starting to grab mindshare in popular culture. That is a prerequisite for many, if not all, of the possible remedies to the problems of govt illegality and overreach.
Now, why is it posted here?
We've already seen multiple tech services announce shutdown as a direct result of Snowden's revelations of NSA's behavior, and solutions to these problems can't be framed without factoring in public support/lack-of.
If you head over to the hackerNews FAQ (I'm sure you can track it down) you'll see that this is eminently on topic.
So yeah. It's an on-topic current event illustrating the traction technology policy that is affecting the entire globe is gaining in popular culture.
Can't imagine why a hacker would be interested in that....