@Mubsi @Deepti_Prasad while you’re at it, can you also validate that short course videos don’t play on Firefox?
After clicking play in https://learn.deeplearning.ai/courses/multimodal-rag-chat-with-videos/lesson/1/introduction the circle spinner appears and never ends.
Here is the screenshot on my system (Fedora 40):
Honestly I didn’t use Firefox for these courses learning.
So can’t much tell about this, all I know firefox has more privacy settings than compare to other browser, so probably that is the reason it is not allowing you to load the videos.
I found a trouble shooting link with firefox, go through it point by point, to link what could be your issue, I am suspecting either antivirus installed or proxy settling comes with an website not allowed by Firefox.
hope the below helps 
Regards
DP
That doesn’t help.
I’d appreciate if somebody from testing team could install latest Firefox and confirm that videos don’t load there.
