Is your feature request related to a problem? Please describe.
We are using the play pause button alongside CurrentPosition, ProgressBar, etc. at the bottom edge of the video player. The PlayPauseButton has a forced size of 60.0. The button looks way too large in this context.

Describe the solution you'd like
Give PlayPauseButton constructor an optional argument that specifies the button's size.

Describe alternatives you've considered
N/a

Additional context
N/a