Two of the NFL's three Christmas Day games have set viewership records. The Detroit Lions-Minnesota Vikings game on Netflix became the most-streamed NFL game in U.S. history.

The NFL averaged 18.7 million viewers per game during the regular season, the second-highest since audience averages began being kept in 1988.

Is there a 'Thursday Night Football' game tomorrow? Here's what to know about the NFL Week 18 and playoff schedules.