Media giant Paramount Global's channels, including CBS and Nickelodeon, will be unavailable on YouTube TV starting Thursday after the two companies failed to reach a contract renewal, both parties said.

Paramount Global is warning of a looming carriage impasse with YouTube TV, meaning channels such as CBS, Nickelodeon, Comedy Central and others could go dark Thursday for millions of subscribers.

Ongoing negotiations involving media giant Paramount Global and YouTube TV, owned by Google, could blackout YouTube TV subscribers from watching more than channels including CBS for which KWCH is an affiliate.

YouTube TV subscribers may lose access to Paramount-owned channels, including CBS, Nickelodeon, Comedy Central, and MTV, among others, as YouTube—owned by Alphabet (GOOG) and Paramount (PARA)—failed to reach a new agreement.