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
into the load channel field.