There are a number of bee escapes available commercially and there are also plans for building a variety of bee escapes. Most of the commercial bee equipment outlets sell a simple bee escape that is oblong in shape and fits in the opening of a standard inner cover. It allows the bees to move from the honey super to the hive body below. These are quite inexpensive, costing only a couple dollars. You can also buy, from Dadant, a board which incorporates several conical bee escapes for about $17.00. We opted to build our own, using a plan for a variation of a triangular escape known as a vortex. Dave Cushman has a great website explaining a variety of "clearer boards", including plans for building the vortex. We made ours from 1/2 inch plywood. We did add the variation that includes using 3 CD roms. The CD's, being slick, help prevent bees from clustering underneath the bee escape and blocking the exits. Here is a photo of one using the CD's:
I did a bit of searching for a video showing a bee escape. Andy's backyard is a series of 5 homemade videos showing how he harvests his honey. He removes the bees by using a triangular bee escape, which he shows. He places the bee escape below the two honey supers and returns the next day to collect the supers, sans bees. Seems to work pretty well. Since our hives are just out back on our property, it is not a big deal to put them in place one day and go out the next to collect the frames. Hopefully it will go as smoothly as it appeared for Andy.