I am also having the same issue. I have tried clearing browser cache, using multiple browsers, as well as incognito and private browsing. I tried something I found in another thread that let me access the video.
UI Academy NOT working - Using the link mentioned by nadim.warsi
I cannot say what this other URL does that the main academy website does not, but it seems there might be an intermittent issue on the main website.
ashokkarale
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