Quietube is a Chrome Extension that only appears when you need it in the OmniBar or Address Bar of Google Chrome. It is a great resource for teacher that show videos through YouTube and want to "quiet" the page for students by removing ads, distracting sidebars and unexpected video suggestions. This Apps can be found int he Chrome Web Store here. When on a page that you can use the extension, a small icon appears. Clicking that icon will open a new page in which your video will play without all the distracting ads.
This is a simple solution for focusing student attention on what is important in a simple, easy way.