Have you noticed the stars? The stars sync with Google Bookmarks, so you can get access to them wherever you go. Once you star something, it shows up above the search results. Stars make search more personal
If you want to link to a specific part of a video on YouTube, you can and Matt tells you how. Link to a specific part of a YouTube video.
Video captions allow you to subtitle a video in the same language as the video, you can help people with low literacy improve their reading skills. Show and Translate YouTube Captions