In 2017, Google introduced the PiP (picture-in-picture) service for owners of RED / Premium paid subscriptions. But it seems that the regime will soon
Who is already available
In June 2018, US residents were able totake advantage of the feature without even having a paid subscription. For some reason, Google then forgot about other countries. Now users from Italy have noticed that this mode also began to work for them. Perhaps in the near future it will be available in other regions of Europe. However, only for owners of smartphones with a version of the OS starting with Android 8.0 Oreo.
The PiP feature allows you to minimize video insmall window and at this time flipping through another application. You can enable it in the settings of YouTube, then open the video and go to another application or to the desktop. The author of the video itself can limit access to the mode. When exactly it will be available to all, is still unknown.