A video device for thox is a component for displaying information and graphics. Most video devices for thox are actually text displays. They can be accessed by thox sometimes directly, other times through an other component, e.g. a GPU in OpenComputers.
Note that while a video device might not be considered a component by the native system, thox abstracts it as is; for example, the internal display in ComputerCraft is considered a component on the built-in bus.
With ComputerCraft monitors, the expected character encoding for displaying glyphs is the custom encoding; see ComputerCraft encoding.
For reference, in ComputerCraft, the monitor API is described through the term.Redirect class. The internal display API is available through the term module, while monitor components implement the monitor API.
Describe capabilities, dimensions, character set, etc. 16-bit palette, definable?