I can only hear the lecture but can’t see the videos, anyone having the same issue? Using Safari on my Mac. Thanks.
Is deeplearning.ai breaking off Coursera? There’s very limited support at Coursera course forum, and the help center link to a community that seems no one there, and when I come over here asking about video problem, nobody seems care. 
I have to cancel my subscription before my card got charged. Maybe resume after the video problem is resolved.
Ok I figured it out – the video will appear simply by playing around with image quality.