How very naive of him not to think that someone within earshot would have a camera recording his every utterance and would then post the recording on social media.
Just watched the video. Seemed a 'tongue in cheek' remark to me.
His audience laughed when he said it.
Nodded to the camera when he said 'I hope this isn't being filmed'.
Still, it'll give some an excuse to clutch their pearls as they reach for the smelling salts.