How to view lost Webpages on Internet?

Did you want to see for older page how does it looks before a year or a month for a particular website. It can very easily seen even though the website has changed the content or theme after a year. You can even see

How to add YouTube 2014 rewind in your website.

This is Holiday season to enjoy these days and come to work with more freshness to begin new wonderful year.  The great YouTube will be launching the video with  all the activities done in world wide in a short snap as mentioned as  “Rewind” it will be released at