Thats a cracking vid on just how not too do the job. Even better would be the follow up filming he/she having to explain themselves.
Until I saw that and the photo's from Graces Dad (i'm a Graces Dad as well by the way) I thought I had seen the worst job ever in my local Chinese. Obviously done by a China Man who specialises in sweet and sour pork. Grout not washed down, Not lined up, tiles cracked but sod it i'll use it anyway and finally the border that looks ok, looks level Black on top White on bottom all the way around the chippy until the last border tile upside down. Nearly choked on chip.