web television vs web tv

web television and web tv both are nouns.

Word	Noun	Adjective	Verb	Adverb
web television	Yes	No	No	No
web tv	Yes	No	No	No

As nouns, web television and web tv are synonyms defined as:

web television and web tv: the genre of original television content produced for broadcast via the World Wide Web.

web television (noun)	web tv (noun)
the genre of original television content produced for broadcast via the World Wide Web.	the genre of original television content produced for broadcast via the World Wide Web.