Apparently this outfit has obtained the rights to show this footage, originally released in 1936 by Paramount's "Eyes and Ears of the World" newsreel service. It's a good reflection of how TeeVee looked and worked in its formative years. Click the image to open the page with the video:
(I think the date that appears on this opening screen shot is wrong, my recollection is this newsreel was shot/released in 1936. But whothehell really knows…?