I get the same message... here's the info

• Browser: Chrome 50.0.2661 Windows 7
• User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.94 Safari/537.36
• Extension: userjs-chrome 5.87.2

Here are some links to you tube videos it gives that message under

/watch?v=7PCkvCPvDXk

/watch?v=CevxZvSJLk8

et al.

The Ummy standalone fetches them fine.