I love the Picture in Picture feature. There are too many web sites which leave you only the choice between a rather small video or full screen. With PIP I can choose the size which works best for my screen. Also, as it floats on top, it is never covered by other applications.

One thing would make this even more increadible: is there a way to set the default size and position? If the PIP feature would always start in my preferred size and position, this would be just so great.