Being on dialup, I can't watch the video. Reading the post's, I'm pretty sure of what you are talking about though. A square of sign board filled with borax and sealed up with crisco. I used it last fall on a hive that had beetles pretty bad. I stapled it to the inside of the top cover, just had to remember to lift the cover up level so the borax didn't dump in the hive. It did work. The number of visable beetles fell way down. However, when removed, their numbers increased again. That hives salvation was moving it out of the nice cool shady spot it was in for 3/4's of the day to full blasting Fl. sun.
Just because we kill the ones in the hive doesn't mean they are gone. They are out there lurking and breeding in the woods just waiting to get a whiff of a bees alarm phermone so they can find a hive. At this point we can only partially control the ones that get in our hives, hopefully, before they lay in them.