The movie ads played fine, but the movie was black screen - when I opened developer tools on browser it said 'DRM rights' error.
I have macOS Monterey 12+ on a 2015 Macbook Pro.
I tried Chrome (latest), Safari, Firefox - all said 'DRM rights' error.
MacBook Pro 15″, macOS 12.7
If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in Safe mode (press and hold the shift key down at startup). It can take much longer to safe boot (5 min) so be patient.
How to use safe mode on your Mac - Apple Support
Safe mode can very often correct weird software behavior by forcing the OS to do cache clearing and other housekeeping. When you're in safe boot, the machine will not be at its best performance, especially with graphics, but that's expected.
Does the problem persist while in Safe mode?
Exit safe mode by restarting your Mac normally and re-evaluate the issue again.
Does your MacBook happen to be connected to an external monitor? It's possible that an older monitor may not properly allow the display of DRM content.
Another ASC discussion on that subject: can't play any content when connected to … - Apple Community
If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in Safe mode (press and hold the shift key down at startup). It can take much longer to safe boot (5 min) so be patient.
How to use safe mode on your Mac - Apple Support
Safe mode can very often correct weird software behavior by forcing the OS to do cache clearing and other housekeeping. When you're in safe boot, the machine will not be at its best performance, especially with graphics, but that's expected.
Does the problem persist while in Safe mode?
Exit safe mode by restarting your Mac normally and re-evaluate the issue again.
Does your MacBook happen to be connected to an external monitor? It's possible that an older monitor may not properly allow the display of DRM content.
Another ASC discussion on that subject: can't play any content when connected to … - Apple Community
Which movie?
all movies
(ugh can't edit my question)
United Entertainment movie doesn't play on Macbook on any browser
