Watching the NASA stream I find it amazing that they as a science organisation are still using non scientific units. All this talk about miles, miles per hour etc.

They rely on funding from the US tax payer, they have to speak in US customary units otherwise they get complaints and then pressure in congress and reduced funding.

Yeah that was pretty surprising. Also at the end of the launch the head of NASA came on quoted the Christian bible and then talked about how the telescope is going to look back into (his) gods creation! I was really taken back by that and a little offended that his religion was brought into such an important scientific event.

I’d imagine that’s for the benefit of the viewing audience more than anything.

The paying viewers, possibly. The vast majority of viewers are surely metric?

Which has a smaller delay than ESA's stream (~31 seconds).

There's also Arianespace's stream which is 6 seconds more current than Nasa's stream.

https://www.youtube.com/watch?v=J70xqApTUow