The video has been removed by the owner. However, even if you count the Harrier twice, that leaves only four operational jump jets. I count the Yak 36, Yak 41, Mirage IIIV, VAK 191, VJ 101, Dornier Do 31, and Rockwell XFV-12 as prototypes of production aircraft. I have not counted pure test beds or STOL only jets. And when you get down to it some of these are dogs. Jeez, why not make it a dozen and put the Scott-Furlong Predator https://abpic.co.uk/pictures/view/1031806 on the list.
Hush-Kit 
The video has been removed by the owner. However, even if you count the Harrier twice, that leaves only four operational jump jets. I count the Yak 36, Yak 41, Mirage IIIV, VAK 191, VJ 101, Dornier Do 31, and Rockwell XFV-12 as prototypes of production aircraft. I have not counted pure test beds or STOL only jets. And when you get down to it some of these are dogs. Jeez, why not make it a dozen and put the Scott-Furlong Predator https://abpic.co.uk/pictures/view/1031806 on the list.