What a wonderful video, Philip, but not to be taken as gospel.

The very first rose identified as a hybrid tea in the video, Apricot Nectar, is actually a floribunda.
I was surprised at the end of the video to see that the garden is in Fukuoka. I actually lived there for a while in a displaced persons camp when the Korean War started and we had to flee the country. Roses were not uppermost in our minds then, however, as you can imagine.