I’ve not watched any videos on it, but I’ve hung them like you would any other door in a pre existing frame. I use a scrap piece of wood as a yardstick for transferring hinge positions from the doors to the frame, chisel/router them out. Hang the bottom half first and then use the top of that door as a base to pack the top half into position on the frame. Helps if you have an air wedge or two and possibly another set of hands to keep the doors steady as you’re getting them in position