Creating a video file from an assembly

hi all,

I have a problem in creating a video file from an assembly.Its showings parts as BLOCKS while regenerating the views.

Pls advice.

Note: kindly refer the attached video.

One more problem for caliculating the weight of the model is

Can we set the density value for all parts in an assembly by using single option.???

my current practice is to open and edit each part in an assembly.

Thanks

M.Y.K

SolidworksAssemblies