Courtney,
Perhaps I can help - I was working at LM when the first SRVL studies were done. They've been doing CVF work in the dome for around 8 years now, I think.
The F-35 is a very stable beast in powered lift. That is due to a number of factors, including quite high inertia (lots of mass), good amounts of control power, but most importantly a very advanced stability and control system.
What that adds up to is an aircraft that's resistant to gusts and, as the guys in the clip point out, very easy to fly compared to the Harrier. This is a point that most discussion of SRVLs overlooks - vastly better handling qualities and simple logic for approach and landing.
Brits have played a central role in the F-35 (especially BAE), taking on (and beating) some of the toughest challenges on the STOVL aircraft. This is another example of their achievements. They don't get enough credit for them, in my view.
Best Regards as ever to the future STOVL team
Engines