After I posted my first answer, I listened to this excerpt again, since the streaming 'broke' after the first minute the first time I tried it.
Yes, the excerpt starts with the music from Parsifal, as I said. But after 1 minute in, the rest of the music you hear is the prelude to Act 1 of Lohengrin, one of Wagner's earlier operas.
Sorry for the slightly misleading post earlier this evening.