“The Children Were Watching,” dir. Robert Drew and Richard Leacock, USA 1961, 25 min. — This documentary doesn’t feel as old to me as I wish it did. In part that’s because I watched it in Trump’s America during an especially difficult year, but something deeper is at play. The film’s ongoing relevance represents an ambiguous answer to its directors’ main question: What were the children of a New Orleans neighborhood learning as they watched their parents during the conflicts surrounding school integration in November 1960?