Friends finally YouTube has changed the search view . in the new update of YouTube search will you are able to see a big thumbnail as compared to the old one . In the new update you are going to have a look like this 
. YouTube have done this so you can find a better video by seeing a big thumbnail and the duration of the video . The main purpose of YouTube for doing this is to to is to allow you to see the video duration and the content of the video so you can select the best video and the kind of video do you want .
for more information about YouTube new search you go to the video -
And if You want youtube latest Update go to the link - https://play.google.com/