For those people complaining about a lack of detail - look how long this video is already. What would you take out to add something else? You could have a 10 hour video and still miss something. The 2 Daves did perfectly fine! Talking of which, Dave - when you do a tear-down of the gear, might it be possible to invite the other Dave along to the lab? With the best will in the world, you know a lot about a lot, but you aren't a radio bloke, and an experienced eye could add quite a bit.
I think this is one of those videos that people will watch over and over as it gains awareness through the ham radio communities. It isn't often that people get to see big infrastructure installations like that. I would have loved to have seen inside my local transmitter (Emley Moor) when they dropped the analogue 5* 870kW ERP - no idea what the TX antenna gain is, but that's a lot of welly (technical expression).
I know it is all filtered positive pressure air, but wow, that really is incredibly clean. Normally HV really does pull all the minute particles out of the air and deposit it in obscure places. Aesthetically that hardware looks fantastic. To an RF-head like me, it is comparable to high Victorian engineering like Papplewick.
Incidentally, here in the UK, main transmitters tend to be vertically polarised, with repeaters being horizontally polarised. Obviously for channel separation, and so the consumer has better rejection of distant co-channel transmitters.