ZVS= Zero Voltage Switch, I guess. Those are frequently used for switching mains voltage, 120v or 220V, either50 or 60 Hz. Whatever voltage you hope to get out of a TV style flyback transformer will probably not be so very high as you are expecting, and then it will burn up.
A "flyback" transformer was made to operate at the TV horizontal sweep frequency, close to 15,734Hz for NTSC color displays, or 15,750 for monochrome displays.