From comments left on Youtube, it would seem that the periodic glitch is part of the Night Gallery transfer, kipling71.
As you may know, MartynH, when Conrad Aiken was eleven, his physician father, possibly a victim of schizophrenia, murdered his mother and shot himself. Aiken found the bodies, was later raised by others, and there is considerable evidence that "Silent Snow, Secret Snow," published in 1934, was inspired by Aiken's brooding on his family legacy. [In those days, it was thought that mental illness was mainly a matter of heredity.] His poetry, stories and novels are shot through with insights and illustrations of Freudian thought.
He would have been working for the WPA Writers Project at the time "Silent Snow, Secret Snow" was published, and might well have had some contact with Welles who, working in the Theater Wing, would have been an impressionable 19. Both artists would have shared the loss of their mothers, and a history of mental illness in their families.
Orson Welles, of course, saw his mother die within a day or two of his Ninth Birthday, and it has been occasionally suggested that he held his Father, Dick Welles, in some way accountable for her death. He also had an older brother, Richard Ives Welles, also 19 when their Mother died, who was institutionalized for much of his life. He seems to have been a secret hardship and responsibility for Welles, who supported his brother modestly until the older man's death.
It has been so long since I've read "Silent Snow, Secret Snow that I don't remember if a "Rosebud-type" globe figures in Aiken's original story or not. But it is possible that these other factors helped draw Welles to Rod Serling's Night Gallery adaptation.
Thank you for turning this video up for us, MartynH, and welcome to Wellesnet.