Complex sentence: At some point in time, WVNY added nightly broadcasts at 6 and 11 becoming more of a big three affiliate offering local news competing with WCAX and WPTZ even though WFFF produces the broadcasts.
Split into simpler sentences: At some point in time, WVNY added nightly broadcasts at 6 and 11. Its news schedule now resembles that of other big three affiliates offering local news, even though WFFF produces the broadcasts.