Is there any word on which aircraft this was?
Having used FR a number of times from BRS this year it is noticeable that not many people appear to pay attention to the safety announcement - and although the crew do demonstrate 'tugging' on an oxygen mask I don't recall specific verbal instructions to do so.
Last year on VS, the safety announcement was stopped and re-started from the beginning when one pax stood up and was evidently not paying attention and I've seen EZY do similar.