Since it is a four hour video I will paraphrase for you. He said something like 'In the past I would tell people that yeah the NSA can trace Tor, but the NSA is not your adversary. I would imagine some FBI agent calling a friend in the NSA and asking for information on a certain event, and the NSA saying we don't know anything about that and hanging up. With the recent relevations about the NSA I am more worried that when the FBI agent calls their friend in the NSA, their friend will say yeah uh look at this person here but don't tell anyone how you found out to look at this, and then the FBI will target that person with a wiretap, or whatever. So yeah, this does worry me more now' not an exact quote but paraphrase, to find exact quote watch the four hour long talk .