The only reason I wanted to bring this up is that in a comment for the Ceefax video above, the top-voted comment is "ceefax scared me as a child". I completely understand.
Longtime readers (or even firstimelongtime) will know that I was absolutely terrified by the intro to the late movie on Channel 7 WABC New York when I was a child.
There must be some magical combination with late hours and sudden tonal and graphic shifts in television programming. But I was sure that every old animated intro for WABC's late night movie was designed to somehow frighten me.
I can only wonder how the tradition continues.