This extension (https://chrome.google.com/webstore/detail/crunchyroll-html5/ihegfgnkffeibpmnajnoiemkcmlbmhmi) turns your player to HTML5, in which there is a shortcut for "next video", and with this remote (https://1drv.ms/u/s!AkQxcYMDzBgHjq5YC6lUDCwxZr-fpA) you will have a Next Video button.