I'm using the Tanzaku theme at elhiloconductor.com and it is great.
The problem is embedded objects does not force the grid to resize. Images, on the other hand, do force resizing. So, when embedding a video bigger than the post box it will apear with a overflow hidden effect.
I believe it is possible to use conditional tags inside the loop to make posts under a certain category look in a particular way. So a solution would be categorizing all posts under a "video category" and forcing this category to be 615px wide, wixh is a two-column width in the Tanzaku theme.
Does somebody know how to do that?
The other solution is to have a 615px wide and 1px high image manually inserted in all video posts. But I don't like that.