Irrelevant. The claim Doiron made was that Hansen had misreported his own temperature record. He hadn’t.
Besides that, HadCRUT4 shows a rise, so does UAH and so does BEST if you add an ocean record like HadSST2. The only popular record that show a decreasing trend since 1998 is RSS.
As for statistical significance – that cuts both ways. You can’t claim temperatures are flat when the uncertainty includes the possibility they are rising. And climate scientists had this all covered if people would have just listened to them: the famous 30-year period we are supposed to use for assessing climate change. It’s there for a reason.