Another good one, 11seconds, 28 and 44 seconds are good views of different parts of the structure.
Notice the angled brick to create the arches , also the "ash drop" at the oven opening.
They end up creating a very square structure at the back filled with insulation but i don't think that is neccessary, a think dome should surfice most ovens.
http://www.youtube.com/watch?v=YhE70a8HC6E
