This is a modified version of leaflet-radar that has play/pause button instead of checkbox. See it in action at tjburrows.com/weather.
leaflet-radar demo
Animated satellite radar overlays for Leaflet, using free and public Web Map Services (WMS).
Toggle the radar on and off. Play the radar animation in a loop, or transition between timestamped radar overlays with slider.
See index.html.
Just leaflet.