I don't have a video for you but some advice. Bone cutters are the best way which you can get a nice pair for <$20 easily.
Get the zoas to close up, or do it after lights out when they close naturally. Find a bump on the rock somewhere with zoas on it that you can snip off. Or perhaps use the bone cutters to snip off the original plug or whatever you glued them down on.
Toxins are truly nothing to worry about in the water. It's cutting them out of the water when they are dangerous because they can squirt when you cut. Also palytoxins are from palys not zoas. And if your worried about it just being in your water, then after cutting them would not be a bad time to change your carbon which would be more than sufficient.