by 1953, said to have been in use in radio broadcast jargon since early 1940s, American English, possibly from Yiddish glitsh "a slip," from glitshn "to slip," from German glitschen, and related gleiten "to glide" (see glide (v.)). Perhaps directly from German. Apparently it began as technical jargon among radio and television engineers, but was popularized and given a broader meaning c. 1962 by the U.S. space program.
No more a-c power line "glitches" (horizontal-bar interference)--because camera filaments are operated from a separate d-c source. [RCA ad for the TK-11A studio television camera in "Broadcasting Telecasting" magazine, Jan. 12, 1953]
All you get today is "glitch" wherever splicing occurs. "Glitch" is slang for the "momentary jiggle" that occurs at the editing point if the sync pulses don't match exactly in the splice. [Sponsor, Volume 13, June 20, 1959]