Very interesting. It's amazing that a President who was born in 1884 was speaking on television. What a marvel it was at the time and a tribute to mans ability.
If you search you'll find all kinds of pre-Kinescope television images. My favorite is a film about RCA's first experimental broadcast in 1936. It's not from the perspective of the viewer, but amazing that it was archived. This is what a chosen few were actually watching on the early RR series 9" mirror in the lid sets:
https://www.youtube.com/watch?v=6iWJ5LObN2o
I had searched out all the pre-1950 Kinescopes once and must say that they're barely a step up from a High School talent show. Surprisingly amateur, however great Berle, Caesar, and Gleason were. Much improved quality only really began in 1951 with "I Love Lucy" with the 3-camera motion picture system developed by Desi Arnaz.
If coast-to-coast TV broadcasting existed in those early post-war days, there likely would've been nothing achieved on Kinescope pre-1951. It only came about to allow the west coast see east coast programming.