They are tiles to be used as embellishments. The artist in the video used wooden tiles for her base ... I didn't have any, so cut up some matboard into 1" squares and used that which worked fine. My stamping was not good (mainly because I was too impatient for everything to dry thoroughly but these 4 (and 1 other) were acceptable out of the 10 I made (5 went straight in the bin!). I've covered the top left one with Glossy Accents and the others with various mediums just to see the difference. The fifth one is UTEE'd and this works as well as the glossy accents. I will definitely be making more of these.
The second video here was also very inspiring and although I don't have the Tim Holtz die I have cut by hand a strip of 'tickets' and plan to have a go ... watch this space?