Google added some new features in to Blogger: "First, "accurate post preview" feature is now available to everyone. Before you publish a post, you may want to preview your post to see how it'll actually look to your readers, in the same format and style of your current Blogger theme. To try it, click Preview button on New Post page. You'll see a new window open with accurate preview of the post.
Second, new "video player" based on YouTube allows full-screen viewing -- now visitors can watch videos that you published on your blog in full-screen mode. It also features better user interface, such as animated seekbar (red bar along the bottom of video) and bigger buttons. You can also right-click on player to see more information about the video. Note that despite the new video player, the videos you upload to Blogger are still only visible on your blog, not on YouTube."