windows 10 enterprise
From past discussions on this, it appears that the enterprise version of Windows 10 doesn't have the media support that Opera needs and uses to play proprietary audio/video codecs. "N" versions have the same issue. However, they can be fixed with https://www.microsoft.com/en-us/software-download/mediafeaturepack. But, that doesn't work for the enterprise version. There may be a workaround for enterprise, but no one so far has found one. You need home or pro edition unless you can find out why enterprise doesn't have the right support and how to add it.