KFSF-DT (channel 66) is a television station licensed to Vallejo, California, United States, broadcasting the Spanish-language UniMás network to the San Francisco Bay Area.

[4] However, from the start, other companies competed for the Channel 66 license, even after Pan Pacific Television was awarded it by the Federal Communications Commission (FCC).

The deal was stalled for years until alleged improprieties by Pan Pacific cracked open the door for Silver King to try and take over the license.

[4] With the likelihood that the company would have to undergo a hearing by the FCC Commissioner's Board regarding the issue, Pan Pacific also realized that the station was ripe for a possible takeover by other prospective licensees, citing a federal law that permitted minority-owned firms to be able to purchase local broadcast media properties that were under FCC investigation at a discount bid.

The dispute over the license was eventually resolved in late 1995, when the Whitehead-Diller partnership reached an out-of-court settlement for an undisclosed sum, in which West Coast Broadcasting agreed to rescind its application and allow Whitehead and Diller to purchase the station.

In June 1998, USA Broadcasting launched a customized independent station format, "CityVision", which infused syndicated programming—including a few produced by sister production unit Studios USA that also aired nationally on USA Network—with a limited amount of local entertainment and magazine programs (reminiscent of the format used by CITY-TV in Toronto and more prominently, that station's sister broadcast television properties that became charter stations of Citytv, when CHUM Limited expanded the format to other Canadian markets as a television system in 2002).

Univision would utilize the former USA Broadcasting stations to serve as charter outlets of the network, which would cater to bilingual Latinos and young adult males between the ages 18 and 34 that seldom watch Spanish language television other than sporting events.