OverPicture for Safari 1.3.1
Size: 3.52 MB
OverPicture is a macOS Safari App Extension that allows you to play any HTML5 video with the new picture-in-picture mode.
Press the play/pause button in any web video player in Safari and then in the toolbar PIP button and the video will start playing in picture-in-picture over your windows. And it will even embed custom buttons in some video players like YouTube.
Note: You have to open the app and then enable the Safari app extension in Safari preferences.
Support for macOS 10.13 High Sierra