I'm having the issue: "Error loading media. File could not be played."
The live news stream there works fine, also YouTube gives no problems. Nor some other clips on other websites.
I just downloaded/installed Opera again after not having used it for years since the change was made from Presto to Chromium.
I have Adblocking unchecked. Don't know how to reset Opera, although I haven't changed much in it.
Consider me a newbie, even though for a decade I used the old Opera even for a few years after the change untill it wouldn't work well any more with increasingly more websites.