From January 31st, 2021 to May 14th, 2021, 100% user give 5-star rating. for PiP Unblocker chrome extension.
Works great! (make sure you also install https://chrome.google.com/webstore/detail/picture-in-picture-extens/hkgfoiooedgoejojocmhlaklaeopbecg)
Works great on youtube tv!
Works on youtube tv (Jan 2021)