Can't play videos from developer.apple.com in Safari

[nuengtmp]

Hi,

I tried to watch a video from developer.apple.com in Safari, but unable to do so.
when I click play, it does load a bit and then change to can't play icon (play icon with a line across).

Other browsers can play them fine, so I think it's my Safari fault.

Anyone else has this problem? Or any idea how to fix it?
I already tried disable ad-blocker, clear history & sites data, empty cache but still no luck.

I'm on Mojave 10.14.6 using Safari 14.1.1

Thanks

 

[KeesMacPro]

Hi,

Running Mojave 10.14.6 with latest security update and Safari 14.1.1
The link you posted works fine on my Mac, so Safari is not the culprit ...