From NYRR.org:

ABC7

Live coverage of the race in New York on ABC7 from 7:00 to 9:00 a.m. EDT, following the action from start to finish

WatchABC and 7online

Live streaming on WatchABC from 7:00 to 9:00 a.m. EDT and on 7online.com from 7:00 to 10:30 a.m. EDT

ESPN3 via WatchESPN

Outside of the New York area, coverage will be available on ESPN3 via Watch ESPN from 7:00 to 10:30 a.m. EDT on computers, tablets, smartphones, Amazon Fire TV and Fire TV Stick, Apple TV, Chromecast, Roku, Xbox 360 and Xbox One for those who have video or internet subscriptions with affiliated providers 

International Broadcast

International viewers can watch the broadcast from 7:00 to 9:00 a.m. EDT via a variety of global broadcast partners (international viewers should check local listings)​. Complete results, race stories, and photo galleries will be available on this site by 7:00 p.m. on race day. Live race-day tracking will be available through the United Airlines NYC Half Mobile App Powered by Tata Consultancy Services and through liveresults.nyrr.org.