What are the symptoms of this error? What is happening?

What are the symptoms of this error? What is happening?

Press play on an embed YouTube video anywhere on the internet. Video tries to load, video fails to load and I get a generic error message with a Playback ID.

OK. Do you have any extensions?

It would help us help you if you provide examples and screenshots of the issue.

You can check the Web Console (Tools -> Web Developer) for messages about blocked content and about the presence of mixed or unsafe content.

• https://firefox-source-docs.mozilla.org/devtools-user/web_console/

You can check the Network Monitor to see if content is blocked or otherwise fails to load.

• https://firefox-source-docs.mozilla.org/devtools-user/network_monitor/

If necessary use "Ctrl+F5" or "Ctrl+Shift+R" (Mac: Command+Shift+R) to reload the page and bypass the cache to generate a fresh log.