Consider watching a variety of videos before doing this job yourself. No one video can adequately offer the best technique for your particular project. This video shows a very quick method that you may prefer if time is of the essence. Thanks for the video.
Never thought I could do this myself until watching your channel your teaching and knowledge is fantastic I now will now do this thanks to your channel cant thank you enough.
Don’t forget to round over the edges and particularly the corners beforehand. Don’t trim off the access rubber as the weight will help stretch it over the edge and ideally leave it to relax in the sun so as to let any creases relax out.