Happens when the video creator wants the advertising money. Not much you can do unless you have a YouTube account. I don't, so I see that message more often.
I'm using FF as well.
It's based on loggin cookies. So if you're logged in on YouTube in one window you can see the video on here. That is if YouTube or this site isn't in a private browser window.
Never seen that. Only issue I have using duckduckgo some videos open into a weird looking android frame. I copy the link and open it in Firefox and the video opens correctly. I don't use Firefox as my every day browser because it's too damn clumbsie with tabs.
@PhoenixPhail I don't get it. Once I've signed in on a device I'm in always unless I remove the device. Unfortunately google has made navigating YouTube settings on a phone a real pain now. They don't want you to log off or remove a device.
@Gibbon It's all part of their needing to be in control of everything. Google has to know everything about everyone. And, at this point, I think they pretty much do. Google knows more about us than WE do. There's no privacy.
@PhoenixPhail There hasn't been for a long time. Microsoft is doing the same with their operating systems now. Forced updates, hardly no 3rd party hardware drivers. No more bypassing logging in on your own machine. They want total control and the forcing of buying new hardware if you want to stay updated and minimize your risk.
Yesssss its youtube being youtube it knows youre not a bot but meta doesnt get ad revenue on you from a 3rd party site unless youre signed in so they force you to pay them pretty much but its marky zuck hes a crook