It doesn't work for me either with chromium. It seems to be some kind of supported video format negotiation error with javascript or something; or CORS or who knows. For some reason a suitable encoding can't be found and it fails with a log message in debugging console as well. However if going to the video URL manually (retrieved from a long long javascript dictionary in the sources), it plays just fine.
Searching for it turns up various issues, from extensions causing troubles (in my case it was a clean-ish profile with no extensions enabled in private browsing where I tried this), to CORS (cross-origin resource sharing) issues, to whatever else. I can't spend more time debugging this right now, but hope this leads to a better track than thinking it's some sort of flash or codecs issue. Mart
