I didn't watch any videos that you had listed, but if your asking if you put a box on top of the hive with a float inside that contains a colony, will they move up. Than my answer would be yes, if you dont want to do a "cutout", you could set a new box with frames on top and they should move up and build comb, after you know that the queen is moved up put an excluder under the top box and after the brood has emerged and moved up remove the bottom box with the "float". But if you do, you will have a mess in the bottom, and if you have reason to think that they are africanized, I wouldn't be trying to save them.