video art vs art

video art and art both are nouns.

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

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

video art: a type of art which relies on moving pictures and comprises video and/or audio data.
art: the products of human creativity; works of art collectively

Other hypernyms of video art include fine art.

video art (noun)	art (noun)
a type of art which relies on moving pictures and comprises video and/or audio data.	the creation of beautiful or significant things
	the products of human creativity; works of art collectively
	a superior skill that you can learn by study and practice and observation
	photographs or other visual representations in a printed publication