Depends on the solution that you buy. Some digital signage vendors sell complete black boxes where you get a hardware that you connect, and it runs just fine, others sell licenses that you have to install on your own hardware.
The Videro solution is a full packaged system that you connect to a display and to a network (if you're connecting to wireless, there's a special remote UI that pops up after first start and lets you enter wireless info, much like on Apple TV systems) just runs. It usually connects to a cloud system, and then you can distribute content to it. It is really hassle free, which is also important for large scale deployments. (If one machine breaks, you can just pop it out, and put a new machine in, one click and it will receive all the content from the previous system and continue the job).
The Videro solution is a full packaged system that you connect to a display and to a network (if you're connecting to wireless, there's a special remote UI that pops up after first start and lets you enter wireless info, much like on Apple TV systems) just runs. It usually connects to a cloud system, and then you can distribute content to it. It is really hassle free, which is also important for large scale deployments. (If one machine breaks, you can just pop it out, and put a new machine in, one click and it will receive all the content from the previous system and continue the job).