telecasting vs video

telecasting and video both are nouns.

Word	Noun	Adjective	Verb	Adverb
telecasting	Yes	No	No	No
video	Yes	No	No	No

As nouns, telecasting and video are synonyms defined as:

telecasting and video: broadcasting visual images of stationary or moving objects

Other synonyms of telecasting include television, TV.

telecasting (noun)	video (noun)
broadcasting visual images of stationary or moving objects	a recording of both the visual and audible components (especially one containing a recording of a movie or television program)
	the visible part of a television transmission
	broadcasting visual images of stationary or moving objects
	(computer science) the appearance of text and graphics on a video display