Blank black screen for Netflix on Safari

Hello, dedancer.

Thanks for posting in Apple Support Communities. We understand that you are unable to see videos on Netflix and Prime Video when playing them in Safari.

Which version of macOS is currently installed on your MacBook Air? To check, go to  > About This Mac. We ask to help us determine if Safari is up to date.

We'd also like to have you test for the issue while your Mac is booted in Safe Mode: How to use safe mode on your Mac - Apple Support

If video plays properly in Safe Mode, restart your Mac and test.

Let us know! Take care.

Hey, dedancer.

We're happy to hear that Safe Mode helped with whatever was causing the issue to occur.

Cheers!