I guess the better coverage of the first stage is that they landed in land and not in a small ship in the middle of the sea. It's more difficult to put cameras in the sea and keep a good connection.

I think it's indirectly related. Probably, the satellite has a low orbit to have a better sight, and they don't expect to have the satellite for too long so care about some drag. So the rocket has more fuel to a return to land maneuver.

Also, it was very strange that they cut the transmission so soon. Usually they continue with the second stage and they highlight many times that the main mission is the satellite and they transmit as much of the satellite as possible in case they have an RUD. This time they closed the transmission as soon as the first stage landed.

Anyway, an amazing transmission.

They couldn't/wouldn't show footage of the 2nd stage, so more attention for the 1st stage. Fine by me, it was amazing to watch

I wouldn't be too surprised if that view was something they'd had before but didn't use because you had the more interesting second stage feed during a normal launch. Today they couldn't show anything from stage 2 because it was an NRO launch and there's a lot of secrecy around what those even look like.