Questions remain after Paramount and YouTube TV agreed on a 'short term extension,' including how long the agreement will last.

In an eleventh-hour agreement late Thursday night, YouTube TV reached what it called a "short-term extension" with Paramount to keep channels such as CBS, Comedy Central and MTV on its subscription streaming service after access to them was set to go dark following failed negotiations around a contract renewal.

Dozens of live television channels could soon disappear for YouTube TV subscribers as the streaming service continues to negotiate a new deal with Paramount, owners of CBS, BET, MTV, Comedy Central and more.