The outer weatherstrip just snaps in, might be a Phillips screw at each end or one end, can't remember offhand.
If there's a hole in the weatherstrip that's for a screw.
The inner weatherstrip staples to the door panel.
Some repro weatherstrips have the pre-drilled staple holes, some don't.
Easy to just line up the original staple holes in the door panel and push new staples thru and fold over.
Yup there's a screw at the back edge for the outer weatherstrip.
Start watching at 7 minutes.