We're happy to hear you successfully connected a YouTube video to your email! I also can understand how helpful it would be for contacts to be re-directed back to your email once the video is finished. However at this time these videos will open to a separate window. Having the ability to play a video in the email, or even have the video re-direct back to your email are both feature requests we have submitted in your account. In the meantime although the video opens in a separate window, the good news is your email is still open. We suggest closing the YouTube window once the video is finished so you can view your email once again.