I got this information from the Texas UIL website.
FOX Sports Southwest and NFHS Network will combine to televise and webcast the UIL Boys Basketball State Tournament March 7-9 at the Alamodome in San Antonio.
NFHS Network will provide a live webcast of all 2019 Boys Basketball State Tournament semifinal games and the 1A – 5A state championship games online with a subscription at www.nfhsnetwork.com/associations/uil. Subscribers can also watch on the go by downloading the NFHS Network app for iPhone and Android devices.
The 6A championship final on Saturday, March 9, will be televised live on FOX Sports Southwest Plus at 8:30 p.m., and will also stream on the FOX Sports digital platforms.