Picture in Picture for quicktime?

I can't seem to find Picture-in-Picture (PiP) in QuickTime 10.4.

Is macOS Sierra's new PiP feature only for Safari?

Solution 1:

QuickTime Player in macOS Catalina has a Picture in Picture button.

Solution 2:

QuickTime has had this feature for a while now, well before Sierra.

1. Open a video with QuickTime Player.

2. View > Float on Top.

3. Right-click or Control-click on the QuickTime Player icon in the Dock.

4. Options > Assign To: All Desktops. (This is available for any app.)

Solution 3:

A good solution is to simply drag a video file to the address bar in Safari and use its PIP feature.