caller ID vs video display

caller ID and video display both are nouns.

Word	Noun	Adjective	Verb	Adverb
caller ID	Yes	No	No	No
video display	Yes	No	No	No

As nouns, video display is a hypernym of caller ID; that is, video display is a word with a broader meaning than caller ID:

caller ID: a small display that will show you the telephone number of the party calling you
video display: an electronic device that represents information in visual form

Other hypernyms of caller ID include display.

caller ID (noun)	video display (noun)
a small display that will show you the telephone number of the party calling you	an electronic device that represents information in visual form