I have some sort of problem at the moment and can't watch youtube, probably some PC settings have changed and so haven't been able to watch the clips.
What I can offer though is the Hawker Typhoon had a difficult start. It was conceived as a replacement for the Hurricane under the Air Ministry Specification F.18/37 which required a 12 gun interceptor. Basically it was rubbish in that role, poor rate of climb and inadequate ceiling.
Many early Typhoons simply vanished, crashing into the sea through causes unknown. Later a structural weakness was identified which resulted in the rear of the fuselage falling off, killing a lot of pilots. Other Typhoons simply crashed for no apparent reason, no obvious structural problems found. The problem came to light when a dead pilot was examined and found to be suffering from carbon monoxide poisoning. Exhaust fume were finding their way into the cockpit, either asphyxiating the pilot or rendering him unconscious, both instances leading to fatal crashes.
It was also very fast and was one of the first aircraft to run into compressibility problems, which were unfamiliar to pilots of the day.
Gloster's chief test pilot, P.E.G. (Jerry) Sayer (test pilot of Britain's first jet aeroplane, the Gloster E.28/39) was killed when testing a Typhoon when he was involved in a mid air collision.
The Typhoon found its métier as a low flying, ground attack fighter bomber, a role in which it excelled. However, this type of combat is highly dangerous and accounted for the loss of a lot of pilots.
