In television systems, video oscillators are used to generate the horizontal and vertical sync signals that control the proper display of images on a TV screen. The horizontal sync signal usually has a frequency of around 15.625 kHz, while the vertical sync signal is typically around 50 Hz (for PAL systems) or 59.94 Hz (for NTSC systems).
In video production and editing, video oscillators can be used to generate special effects, such as wipes and fades. The frequency range of these oscillators may extend beyond the standard video frequency range, depending on the desired effects.
In summary, the frequency of a video oscillator can vary based on the specific application, ranging from a few tens of hertz to tens of kilohertz, but it primarily operates within the video frequency range for proper video signal generation.