A video splitter is a device that takes one signal from a video source and replicates it over multiple monitors. The number of times that a video splitter divides the signal varies; video splitters currently on the market provide divisions for as few as two ports or as many as hundreds of ports.
The meaning of “freelancer” is very broad. A freelancer is a person who is self-employed, often working for multiple clients at one time and earning income per project.