NOTE: From chrome webstore the extension is not functional for now :( . you can get it from here and run it in developer mode

Covered by the next web :) http://thenextweb.com/apps/2015/11/06/skip-youtube-search-results-and-launch-videos-instantly-with-this-chrome-extension/
Also Feautured on Product hunt : https://www.producthunt.com/tech/i-am-feeling-lucky-youtube-extension
Skip YouTube search results and launch videos instantly.

A great extension to use if you are want to jump right to a video/song in youtube you frequently watch/hear without the intermediate hassle of clicking the first search result. This extension adds the functionality of I am feeling lucky button in google search to youtube.com, i.e redirects to first video in youtube search result. To use it click the I am feeling lucky button next to search button or press shift enter after typing your query in the search box.