https://www.cnet.com/news/super-bowl-2019-patriots-vs-rams-watch-online-start-time-halftime-show-ads-commercials/

If you're willing to watch on a phone or tablet and not screencast to your TV, you can livestream the Super Bowl with the NFL Mobile app or the Yahoo Sports app for free.

CBS will start livestreaming about 30 minutes before kickoff at at 6 p.m. ET (3 p.m. PT). Kickoff is scheduled for around 6:30 p.m. ET (3:30 p.m. PT).