Pyle, that's an excellent tutorial on rose cones. Notice, although she didn't mention it, there are two sizes of cone shown in the video.
I use the larger ones (marketed as 18 inches tall), moreso, in my garden, than the smaller, 12 inch cones (although I do use the smaller cones over my Skimmia reevesiana, and Indigofera kirilowii).
I store my cones, each year, so I don't have to buy a lot of them every year. If I do buy more cones, it is only to buy protection for a new plant to my collection, that needs protection, or to replace a few that broke apart, blew away, etc.
I have some rose cones that are over 10 yrs old. For some reason, this past fall, the local Home Depots didn't sell any rose cones.
Also, I had added a number of plants to my yard that needed protection. So, I would have had a dilemma, if I had not found rose cones for sale, online. They usually cost 6 bucks each, for large cones, and 5, for smaller ones, locally. I bought 10 online, with free shipping, for under $60, so that was a deal. Just recently, Ebay and Amazon were selling just ONE cone for extremely high prices.
Steer clear of the "price-gougers", LOL.