How do you listen to music in the home?

That's pretty impressive, coming from the age when the average domestic gramophone was still clockwork with an acoustic pick-up. Magnetic pickups that would connect into the "GRAM" input of a radio set were just becoming available but they were very expensive. Most radio sets didn't even have a GRAM input and most of those would not have had an input selector, often you just de-tuned the radio to a blank spot between stations. Only radiograms with combined radio and gramophones had input selector switches.

Judging by the set-up and location I'd guess he was using the portable radio receiver as an amplifier, the microphone would then be part of the radio station studio to broadcast the recordings over the airways. Quite why they didn't simply connect the turntables directly is anyone's guess, but mine would be that the studio engineer didn't want them to.

I have an acoustic pick-up and a tin of needles somewhere in the attic that I acquired in the late 60s, and think I may still have a few 78s too. Back then you could find clockwork/acoustic record-players very easily (and cheaply) in church Bring-and-Buy sales even though electric record-players had been around since the 50s. 

Here is a Thorens wind-up portable turntable from 1932:

TOTL circa 1978 and of my 6 vintage TTs, this is the best sounding/playing TT i own!

2). I have a U-turn orbit turntable which I plug directly into my $99 receiver with phono input.  Its not the best but it works for now.  I have a pair of polk bookshelf speakers sitting on the floor that I play from.  

3).  Plug my phone into the aux port of my receiver and play from there

I do most my listening at work with headphones on and I'm too cheap to do anything about my poor listening situation at home