Why post that, when you could have listened again? It's not clear but he's presumably talking about his wife working in the NHS "on the front line, keeping people alive, so I really don't need lectures from you about this pandemic". The guy was ranting about making children wear masks in schools - what's that got to do with closed pubs?
As I said when presented with a small window of opportunity people often go over the top and they never get over what they really want to say it just comes across as a crazy rant.
We don't know that's what Starmer was referring to in his reply but it's still appears condescending.