From video description:

This talk, presented by the CAD & Technical Lead at the London Ambulance Service, will describe everything that happens between dialling 999 and getting to hospital, and all of the technology involved in triaging the call, dispatching the ambulance, and helping patients over the phone before it arrives

For myself: Wayback It saves link to multiple different web archives and gives me pdf and warc files.

For others: Archive team have a few active projects to save at risk data and there is IRC channel in which people can suggest adding other websites for saving. They also have wiki with explanations how people can help.

Skip to 0:36 for TLDW

TLDW: Depends on how many hours you will fly per year. 50 Hour/Year - $89000 per year. 100 Hours/ Year - $131000 per year. 200 Hours/Year - $215000 per year

They are showing three things. Spring loaded mechanism. String guided arrows with small metal prongs and wooden armor. Air cannons for shooting a lot of arrows at the same time.