Complex sentence: WFFF's 10 o'clock production is not the first in the market because back on July 16, WCAX began producing a weeknight 10 o'clock newscast which can be seen on their digital 24-hour local weather channel.
Split into simpler sentences: WFFF's 10 o'clock production is not the first in the market. It can be seen on the station's digital 24-hour local weather channel.