The information content of the video might be not too big - it boils down that river sands, which are the best for concrete are somewhat scarce. But it is worth

The information content of the video might be not too big - it boils down that river sands, which are the best for concrete are somewhat scarce. But it is worth while watching it, as towards the end they show microscope takes of the different kinds of sand being talked about. Those takes clearly show nicely how different the artificial, river and sea sand are with some faszinating imaginery. So this is a case, where the video adds to the textual information. Though it takes a while till it gets to the really interesting part.