You can visually insert a radio button into your form and set its properties. Use radio buttons when you want users to select only one choice from a set of options.
Evoland is a game where you start playing in the old school Nintendo GameBoy 8-bit graphic with no sound and gradually fight your way to the modern 3D, HD adventure.
If you want to put your video files online using HTML5 then it's recommended to have three different formats for a full browser support. Those formats are mp4, ogv and webm.