YouTube add new features to embedded YouTube videos that you embed elsewhere will feature a new search bar right on top of the embedded player.
This new search bar will allow any visitor of a website containing the embedded video to type a search term or phrase and see the results with YouTube videos matching the request. when you click any video in the search results, it will begin playing right there in the very same player.
You can also customize YouTube videos for your website or blog in a variety of manner by modifying its dimensions and adding different color borders more details click here
