I use the type of diaper harness shown in the video. I like it, because it allows my goose to reach her tail gland when she preens herself.I use a whole size 6 baby diaper inside and double tape to stay in place.
I have not yet made a video using the new diapers because they are a bit trickier to put on him and doesn't make for a good video! LOL!
I developed a little diaper hack: By stapling the half diaper I create a little pouch, and the flaps are used to hold the diaper pouch in place. Works like magic!