Same for me.
I suggest to use the feedback button at the bottom of that page.
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I can't play any of the videos in MS Learn. For example: https://free.blessedness.top/en-us/training/modules/describe-azure-compute-networking-services/6-functions
I've tried in Edge, Chrome and Safari but all show the same error: "We're having trouble connecting you to the stream"
Same for me.
I suggest to use the feedback button at the bottom of that page.