Hi ,
I am Ivan, I will help you with this.
This is a Udemy problem not a Windows one as they have a DRM system to protect the videos.
Contact Udemy support.
Some users managed to resolve this by clearing the cache and disabling hardware acceleration in the browser.
https://support.udemy.com/hc/en-us/articles/225...
Another alternative solution would be to download the classes.
https://support.udemy.com/hc/pt/articles/229231...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
Hope this helps.
If you find the answer helpful, please mark it as an answer.
Independent Advisor - Community
Thanks