public YouTubeOverlay arcSize(@DimenRes int resId) {
        setArcSize(getContext().getResources().getDimension(resId));
        return this;
    }
Size of the arc which will be clipped from the background circle.
The greater the value the more roundish the shape becomes
app/src/main/java/com/brouken/player/dtpv/youtube/YouTubeOverlay.java