Based on other threads on FlyerTalk (no personal experience), it seems like the consensus is that the DVDs are OK (i.e. the won't care) as long as you only have one copy of each title (personal use versus distribution).
The alcohol is not OK.
Originally Posted by
USDHS1984
The policy towards middle aged adults with more than a liter of alcohol is remarkably similar.
And are adults who are of age dumb enough to fall for this? If the CBP agent really wants to spend time calculating a few cents worth of duty, I say, go ahead.