How to Watch Picture-in-Picture Videos On Chrome 70 or Vivaldi browsers
If you’re on Windows or Mac, you can enable PIP by right-clicking a video and clicking “Picture in Picture Mode.” If you’re watching on YouTube, you’ll need to double-right click. Some developers might also offer buttons you can use to enable PIP, as seen here, and some videos might even launch automatically in PIP. (Some video players don’t support this feature, but you can try using the Picture-in-Picture extension to fix that.)
You can click and drag the corners or sides of the PIP window to resize it. The player will remain on top of any Chrome windows you have open, and the tab where the video originates will have a blue-outlined asterisk icon prominently displayed to the left of the tab’s title, which makes it easy to find if you’re bouncing between multiple tabs.
It's working well for me on Vivalidi browser on Linux. More info at https://lifehacker.com/how-to-watch-picture-in-picture-videos-on-chrome-70-1829944082
|How to Watch Picture-in-Picture Videos On Chrome 70