Yesterday, I enabled some Google Mail features offered from its Labs section — I’ve enabled some before. Google Mail Labs is a place to test some new features in Gmail. There are many features/applications we can test.
I enabled YouTube, Picasa and Flickr preview in mail features. If we enable this feature, we can see multimedia files preview inside our Google Mail account. The pictures/videos will be derived from the link inside the mail content. If there is a link to YouTube video, we can watch the video inline. Useful!