The ability to move video into a picture-in-picture overlay with macOS Sierra is a great new feature. However, it doesn't appear to work with YouTube videos. You can get YouTube videos to do this, however, if you know how.
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▶ Watch more videos about related subjects: Video (65 videos), Web (79 videos), YouTube (7 videos).




After activating Picture-In-Picture for Youtube you can also move the video around "anywhere" on the screen when holding down the Command/Cntl key.
Fascinating. Thanks. I don't know how you find out all this stuff!
Wow! thanks once again Gary