YouTube has begun testing picture-in-picture for videos on the web

One of the best features of the YouTube mobile app on iOS and Android is the ability to minimize the video while it is playing and continue browsing the site. It's one of several convenient features that has been exclusive to mobile, but according to a report from 9to5Google, YouTube has begun testing picture-in-picture functionality on the desktop version of the website as well, although Google has yet to make any official announcements. 9to5Google claims that YouTube is currently A/B testing t...