Bmx freewheel removal ?

[Chess]

Hi all, anyone know how to get this off ? Been having real head scratching and no luck.

 

[lpretro1]

Chain whip?

 

[Chess]

Its my grandsons bmx bike. Using a pin spanner, I got the ring off ( left hand thread ) got the bearings and pawls out, but can't for the life in me get the sprocket off.

 

[Chess]

Thanks all. After watching the video, it looks like a complete new wheel.
Thanks for your replies.
Have a good weekend.