Impossible to see my teacher video on stream

For my moodle class, I do have access to the live lectures on Microsoft Teams, but I don’t have access to the recording of the previous weeks lectures on Stream.

When I click on the links to the lecture recordings on moodle ( a private link to a private video on stream) , it sends me directly to Microsoft steam on the internet, and the page is well connected to my UCL account, but the video is unavailable ('Oops it seems that you don't have access’).  

I tried to disconnect and connect but nothing.

My teacher does know what's the pb, and I am the only one in my class for whom it happens.

Thank you