How come when I use the input element, it adds 'name' after it? It does not do this for the videos. Is it because it is version 3 of sublime?

I guess it's a matter of settings of sublime itself or some of its plugins. But for inputs with type of radio to work correctly you do need name attribute. If you have several radio buttons this attribute (which value must be the same for these radio buttons) allows user to choose only one option. Please have a read here: https://developer.mozilla.org/ ... group