Back in November, Google introduced a picture-in-picture mode for Android Oreo users, which was only supported by YouTube Red and YouTube Premium. However, it seems the feature is now rolling out to the non-paying YouTube users as well.
Spotted by XDA Developers and confirmed by Google’s support page, the picture-in-picture mode lets you minimize a video to a corner to keep watching while browsing around other apps. To use this service, you need to toggle picture-in-picture mode in both the YouTube app and system settings. Once you’re done, just open a video and tap on the home button, and the video will automatically minimize to a corner. Please keep in mind, this feature doesn’t with most music videos, and the mode could be restricted by the uploader as well.
For now, the feature is only available in the US, means you’re out of luck if you live outside the US. It’s still not sure when the feature will be available to all Android users around the world. iOS users may have to wait as well to enjoy this feature.