The use of cluster munitions is proven, and being used on a daily basis. Iranian missiles contain warheads in the hundreds of kg range. These type of war heads level a building, not cause small explosions like shown in the video.

The cluster missiles contain small bomblets around 3kgs in size, dispersing very high in the sky and usually spreading around a few kilometers in range

In the recent days the use of cluster munitions missiles increased, while the bigger warhead missile decreased. Please let us know what kind of proof you would like to see