Youtube videos play only in Firefox's Incognito Private window

AI-generated summary

The user, Bathinda, reports that YouTube videos play only in Firefox’s Incognito/Private window but not in the normal window. The issue was resolved by identifying that Firefox’s Enhanced Tracking Protection (indicated by a blue badge in the URL bar) was blocking the videos. This protection affects external media links like YouTube and Twitter. Turning off this feature resolved the problem, and the user seeks a way to disable it permanently for all sites with a single action. Bathinda Bathinda

My embedded Youtube video links play ok in my website when the (normal/admin) viewer is viewing them in Firefox Incognito/Private window.

But the same (or even any) youtube video, don’t play in main Firefox window.
I do remember that there was some ‘Trust’ setting in somewhere in Admin Settings, under which I had to put ‘Youtube’ in ‘trusted’ list perhaps. But I’m not sure where or what that setting was.

I’ve even checked that YT embedded videos even on meta discourse don’t/aren’t playing in my FF windows normal tab.
Pls help.

The problem was the enhanced tracking protection of the Firefox, which was shown by a blue badge to the just beginning of the url bar, something like this:

This was discovered by me from this meta solution. As evident in this meta solution, this problem would not only stop YT videos, but also twitter links/videos etc. And may be some other external media links too. So all problems are solved now.

As soon as I turned off that protection (I’ll search for as to how can I turn off that nuisance protection for all sites, forever, in one click).