There’s a similar meme going around the US, but I’ve yet to find any (except one, noted below) health expert who actually said “masks don’t work” rather than “we don’t know that masks work.”
The one exception I’ve been able to find was the US Surgeon General Jerome Adams.
This seems like a clear example of health authorities sharing a nuanced true-at-the-time message that got stripped of that nuance and rounded out to the nearest (false) simplified interpretation.
From the chief public health officer of Canada who is also a WHO advisor. She's also said other very questionable things (which are all Googleable and which pretty much every Canadian can tell you as it's been a bit of an ongoing scandal, among others...).
Not sure if that’s the same interview you linked though^