basically, once you add video urls and create the channel, the channel will start a sort of live stream where it will record the date and time you created the channel, and play the videos based on the current time, so it doesn't require a server or even one to host their own videos. You can use platforms like internet archive to host the raw mp4 video urls.
If you just want to test it and see if it works, type : CartoonNetwork
Basically, this website lets people start their own channel live stream like on television. You know how the videos play in a pre-defined order based on a sort of schedule? This website allows you to create a channel like that which is live/anyone opening it will see the same video at the same time as you (give or take a minute based on latency). There is no server-side processing or physical mp4 video files you need to host.
If you just want to test it and see if it works, type : CartoonNetwork
into the load channel field.