Indus Valley civilization in mohenjo daro

The animated video was kind of neat how they recreated the buidings and displayed how the people lived.  The part when they had shown a walk through the columns and how the shadows were laying on the ground is the best part visually which makes you feel like you might actually be there with them for only a second. I wonder how accurate they were with the layout and things including what looked like a pottery market place. Was pottery the only main art object they sold? Also I noticed the people were pulling up vessels and carrying them on their heads; did these just contain water, were they for other things?