After watching a video and looking around it looks like I was in error. Pretty much I can be signed into lemmy.ca … then change he view filter to show all communities and subscribe to technology community on ML. The subscribe button does not always update right away. But in my listing of lemmy.ca I see I am subscribed. Hope this helps someone else.
Its my understanding that the CBC Ideas podcast will have the lectures eventually posted there:
https://www.cbc.ca/listen/live-radio/1-23-ideas